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EspañolSTRUCTURAL HISTORY OF THE ROMAN MILITARY
The 'structural history of the Roman military' describes the major chronological transformations in the organisation and constitution of ancient Rome's armed forces, ''"the most effective and long-lived military institution known to history"''.[1] From its origins around 800 BC to its final dissolution in 476 AD with the demise of the Western Roman Empire, Rome's military underwent substantial structural change. At the highest level of structure, Rome's forces were split into the Roman army and the Roman navy, although these two branches were less distinct than in a modern national defence force. Within the top-level branches of army and navy, structural changes occurred both as a result of positive military reform and through organic structural evolution. Rome's military structure passed through four distinct phases:
Initially, Rome's military consisted of an annual citizen levy performing military service as part of their duty to the state. During this period, the Roman army would prosecute seasonal campaigns against largely local adversaries.
As the extent of the territories falling under Roman suzerainty expanded, and the size of the city's forces increased, the soldiery of ancient Rome became increasingly professional and salaried. As a consequence, military service at the lower (non-staff) levels became progressively longer-term. Roman military units of the period were largely homogeneous and highly regulated. The army consisted of units of citizen infantry known as legions (Latin: ''legiones'') as well as non-legionary allied troops known as ''auxilia''. The latter were most commonly called upon to provide light infantry or cavalry support.
In the third phase of the city's military development, Rome's forces were tasked with manning and securing the borders of the provinces brought under Roman control, as well as Italy itself. Strategic-scale threats were generally less serious in this period, and strategic emphasis was placed on preserving gained territory. The army underwent changes in response to these new needs and became more dependent on fixed garrisons than on march-camps and continuous field operations.
In the final phase of Rome's military, military service continued to be salaried and professional for Rome's regular troops. However, the trend of employing allied or mercenary troops was expanded such that these troops came to represent a substantial proportion of Rome's forces. At the same time, the uniformity of structure found in Rome's earlier military forces disappeared. Soldiery of the era ranged from lightly-armed mounted archers to heavy infantry, in regiments of varying size and quality. This was accompanied by a trend in the late empire of an increasing predominance of cavalry rather than infantry troops, as well as a requital of more mobile operations.
Tribal forces (c. 800 BC – c. 578 BC)
The earliest Roman army mentioned in writing is ascribed by our much later sources, Livy and Dionysius of Halicarnassus, to the 8th century BC; and is often referred to as Rome's ''curiate'' army, named for the subdivisions of the army based upon the three founding tribes (Latin: ''curiae'') of Rome. This army was a relatively small force, and its activities were limited ''"mainly [to] raiding and cattle rustling with the occasional skirmish-like battle"''.[2] It lacked much of the professionalism and organisation of later Roman armies, with individual units or regiments probably being formed upon divisions by tribe, or ''gens''. During this period Rome was probably fortified as a hill-top village and its army of the time can be compared loosely to a typical Bronze-Age warrior band led by a warrior chieftain. Much of the arms and armour of this period was very similar to the rest of the Villanovan culture[3] that was predominant in the region. Sword patterns, for example, were very similar to the bronze antennae hilted weapons in use by other peoples of the age.[4]
The army (Latin: ''legio'') consisted, according to Livy, of exactly 3,000 infantry and 300 cavalry (or possibly mounted infantry) during this period, one third from each of Rome's three founding tribes.[5],[6] The numbers are a little too exact and Livy's historical remove of 500 years too great for these figures to be taken literally. However, Livy is almost certainly correct that the greater mass of the army at this time consisted of footsoldiers (Latin: ''pedites''), probably homogeneous infantry armed with javelins. The cavalry (consisting either of ''celeres'', ''equites'', or both) was far smaller in number and probably consisted solely of the city's richest citizens.[6] The army may also have contained a number of chariots in its very earliest incarnation.[8]
By the turn of the 7th century BC, the Iron-Age Etruscan civilization (Latin: ''Etrusci'') was dominant in the region.[9][10] As with most of the other peoples in the region, the Romans warred against the Etruscans. By the close of the century the Romans had lost their struggle for independence, and the Etruscans had conquered Rome, establishing a military dictatorship, or kingdom, in the city.
Etruscan-model hoplites (578 BC – 510 BC)
Ancient Greek sculpture of a hoplite, on which Rome's first class of infantry was based, circa 5th centry BC
Although several Roman sources talk extensively about the Roman army of the Roman Kingdom period that followed the Etruscan capture of the city, including Livy and Polybius, none of them are contemporary sources. Polybius, for example, was writing some 300 years after the events in question, and Livy some 500 years later. Additionally, what records were kept by the Romans at this time were later destroyed when the city was sacked. The sources cannot therefore be seen as being reliable for this period as they are on later military history from the First Punic War onwards, and much of the history of this period is considered to be apocryphal.
According to our surviving narratives, the three kings of Rome during the Etruscan occupation were Tarquinius Priscus, Servius Tullius, and Tarquinius Superbus. During this period the army underwent a reformation into a ''centurial'' army based on socio-economic class.[11] This reformation is traditionally attributed to Servius Tullius, the second of the Etruscan kings. Tullius had earlier carried out the first Roman census of all citizens.[12] Livy tells us that Tullius reformed the army by transplanting onto it the structure derived originally for civil life as a result of this census. At all levels, the military was, at this time, considered to be a civic responsibility and a way of advancing one's status within Roman society.[13]
However, Rome's social classes were qualified rather than created by the census. It is perhaps more accurate to say therefore that the army's structure was slightly refined during this period rather than radically reformed: Prior to these reforms, the infantry was divided into the ''classis'' of rich citizens and the ''infra classem'' of poorer citizens. The latter were excluded from the regular line of battle on the basis that their equipment was of poor quality.[14] During the reforms, this crude division of poorer and richer citizens was further stratified. The army thereafter consisted of a number of troop types based upon the social class of propertied citizens, collectively known as ''assidui''. From the poorest in the "fifth class" to the richest in the "first class" and the equestrians above them, military service was compulsory for all.[15] However, Roman citizens at this time generally viewed military service as a proper undertaking of duty to the state in any case, in contrast to later Roman views of military service as an unwelcome and unpleasant burden.[16][17] Whereas there are accounts of Romans in the late empire mutilating their own bodies in order to exempt themselves from military service,[18][17] there seems to have been no such reluctance to serve in the military of early Rome. This may, in part, be due to the generally lower intensity of conflict in this era, to the fact that men were fighting close to and often in protection of their own homes, or due to – as posited by later Roman writers – a greater martial spirit of antiquity.[20]
The equestrians, the highest social class of all, served in mounted cavalry units known as ''equites''. The first class of the richest citizens served as heavy infantry with swords and long spears (resembling hoplites), and provided the first line of the battle formation. The second class were armed similarly to the first class, but without a breastplate for protection, and with an oblong rather than a round shield. The second class stood immediately behind the first class when the army was drawn up in battle formation. The third and fourth classes were more lightly armed than their richer contemporaries, and carried a thrusting spear and throwing javelins. The third class stood behind the second class in battle formation, normally providing javelin support. The poorest of the propertied men of the city comprised the fifth class. They were generally too poor to afford much equipment at all and were armed as skirmishers with slings and stones. They were deployed in a screen in front of the main army, covering its approach and masking its manoeuvres.
Men without property, who were thereby excluded from the qualifying social classes of the ''assidui'', were exempted from military service on the grounds that they were too poor to provide themselves with any arms whatsoever. However, in the most pressing circumstances, even these ''proletarii'' were pressed into service,[21] though their military worth was probably questionable. Troops in all of theses classes would fight together on the battlefield, with the exception of the most senior troops, who were expected to guard the city.
The army is said to have increased from 3,000 to 4,000 men in the fifth century, and then again from 4,000 to 6,000 men sometime before 400 BC.[22] This later army of 6,000 men were then divided into 60 ''centuries'' of 100 men each.[23]
Manipular legion (509 BC – 217 BC)
The army of the early Republican continued to evolve, and although there was a tendency among Romans to attribute such changes to great reformers, it is likelier that changes were the product of slow evolution rather than through a singular and deliberate policy of reform.[24]
During this period, an army formation of around 5000 men was known as a legion (Latin: ''legio''). However, in contrast to later legionary formations of exclusively heavy infantry, the legions of the early and middle Republic consisted of both light and heavy infantry. The term ''manipular army'' (an army based on units called ''maniples'') is therefore used to contrast the later ''legionary'' army of the Empire that was based around a system of ''cohort'' units. The manipular army was based partially upon social class and partially upon age and military experience.[25] It therefore represents a theoretical compromise between the earlier class-based army and the class-free armies of later years. In practice, even slaves were at one time pressed into the army of the Republic out of necessity.[26] Normally a single legion was raised each year, but in 366 BC two legions were raised in a single year for the first time.[6]
The manipular army got its name from the manner in which its heavy infantry was deployed. ''Maniples'' were units of 120 men each drawn from a single infantry class. The maniples were small enough to permit tactical movement of individual infantry units on the battlefield within the framework of the greater army. The maniples were typically deployed into three discreet lines (Latin: ''triplex acies'') based on the three heavy infantry types of ''hastati'', ''principes'' and ''triarii''.[28] The first type, the ''hastati'', typically formed the first rank in battle formation. They were leather-armoured infantry soldiers who wore a brass cuirass and brass helmet adorned with 3 feathers approximately in height and carried an iron-clad wooden shield, tall and a convex rectangle in shape. They were armed with a sword known as a ''gladius'' and two throwing spears known as ''pila'': one the heavy ''pilum'' of popular imagination and one a slender javelin.[29]
| "the Romans... habitually enrol four legions each year, each consisting of about four thousand foot and two hundred horse; and when any unusual necessity arises, they raise the number of foot to five thousand and of the horse to three hundred. Of allies, the number in each legion is the same as that of the citizens, but of the horse three times as great" |
| ''Polybius, ''The Histories'', 1:268-70'' |
The second type, the ''principes'', typically formed the second rank of soldiers back from the front of a battle line. They were heavy infantry soldiers armed and armoured as per the ''hastati'', except that they wore a lighter coat of mail rather than a solid cuirass. The ''triarii'', who typically formed the third rank when the army was arrayed for battle, were the last remnant of hoplite-style troops in the Roman army. They were armed and armoured as per the ''principes'', with the exception that they carried a pike rather than two ''pila''. A manipular legion typically contained 1200 ''hastati'', 1200 ''principes'' and 600 ''triarii''.[30] The three classes of unit may have retained some slight parallel to social divisions within Roman society, but at least officially the three lines were based upon age and experience rather than social class. Young, unproven men would serve as ''hastati'', older men with some military experience as ''principes'', and veteran troops of advanced age and experience as ''triarii''.
The heavy infantry of the maniples were supported by a number of light infantry (Latin: ''velites'') and cavalry (Latin: ''equites'') troops, typically 300 horsemen per manipular legion. The cavalry was drawn primarily from the richest class of equestrians, but additional cavalry and light infantry were drawn at times from the socii and Latini of the Italian mainland. The ''equites'' were still drawn from the wealthier classes in Roman society.
There was an additional class of troops (Latin: ''accensi'', also ''adscripticii'' and later ''supernumerarii'') who followed the army without specific martial roles and were deployed to the rear of the ''triarii''. Their role in accompanying the army was primarily to supply any vacancies that might occur in the maniples, but they also seem to have acted occasionally as orderlies to the officers.
The light infantry of 1200 ''velites'' consisted of unarmoured skirmishing troops drawn from the youngest and lower social classes. They were armed with a sword and buckler ( diameter), as well as several light javelins, each with a wooden shaft the diameter of a finger, with a c. narrow metal point. Their numbers were swollen by the addition of allied light infantry and irregular ''rorarii''.
The Roman levy of 403 BC was the first to be requested to campaign for longer than a single season,[31] and from this point on such a practice became gradually more common, if still not typical.
A small navy had operated at a fairly low level after the Second Samnite War, but it was massively upgraded during this period, expanding from a few primarily river- and coastal-based patrol craft to a full maritime unit. After a period of frenetic construction, the navy mushroomed to a size of more than 400 ships on the Carthaginian pattern. Once completed, it could accommodate up to 100,000 sailors and embarked troops for battle. The navy thereafter declined in size. This was partially because a pacified Roman Mediterranean called for little naval policing, and partially because the Romans chose to rely during this period on ships provided by Greek cities, whose peoples had greater maritime experience.[32]
Proletariatisation of the infantry (217 BC – 107 BC )
The extraordinary demands of the Punic Wars, in addition to a shortage of manpower, exposed the tactical weaknesses of the manipular legion, at least in the short term.[33] In 217 BC, Rome was forced to effectively ignore its long-standing principle that its soldiers must be both citizens and property owners when slaves were pressed into naval service; around 213 BC, the property requirement was reduced from 11,000 to 4,000 asses. Since the Romans likely preferred to employ slaves over poor citizens in their armies,[21] it must be assumed that, at this point, the ''proletarii'' of the poorest citizens must also have been pressed into service despite their legal lack of qualification. By 123 BC, the financial requirement for military service was slashed again from 4,000 ''asses'' to just 1,500 ''asses''.[35] By this time, therefore, it is clear that many of the property-less former ''proletarii'' had been nominally admitted into the ''adsidui''.
During the second century BC, Roman territory saw an overall decline in population,[36] partially due to the huge losses incurred during various wars. This was accompanied by severe social stresses and the greater collapse of the middle classes into lower classes of the census and the ''proletarii''. As a result, both the Roman society and its military became increasingly proletarianised. The Roman state was forced to arm its soldiers at the expense of the state, since many of the soldiers who made up its lower classes were now impoverished ''proletarii'' in all but name, and were too poor to afford their own equipment.
The distinction between the heavy infantry types of ''hastati'', ''principes'' and ''triarii'' began to blur, perhaps because the state was now assuming the responsibility of providing standard-issue equipment to all but the first class of troops, who were alone able to afford their own equipment. By the time of Polybius, the ''triarii'' or their successors still represented a distinct heavy infantry type armed with a unique style of cuirass, but the ''hastati'' and ''principes'' had become indistinguishable.
In addition, the shortage of available manpower led to a greater burden being placed upon its allies (''socii'') for the provision of allied troops.[37] Where accepted allies could not provide the required force types, the Romans were not adverse during this period to hiring mercenaries to fight alongside the legions.[38]
Marian legion (107 BC – 49 BC)
Bust of Marius, instigator of the Marian reforms
In a process known as the Marian reforms, Roman consul Gaius Marius carried out a programme of reform of the Roman military.[39] In 107 BC, all citizens, regardless of their wealth or social class, were made eligible for entry into the Roman army.[40] This move formalised and concluded a gradual process that had been growing for centuries, of removing property requirements for military service.[41] The distinction between ''hastati'', ''principes'' and ''triarii'', which had already become blurred, was officially removed,[42] and the legionary infantry of popular imagination was created. Legionary infantry formed a homogeneous force of heavy infantry. These legionaries were drawn from citizen stock; by this time, Roman or Latin citizenship had been regionally expanded over much of ancient Italy and Cisalpine Gaul (Latin: ''Gallia Cisalpina'').[43] Lighter citizen infantry, such as the ''velites'' and ''equites'', were replaced by non-citizen ''auxilia'' that could consist of foreign mercenaries.[44] Due to the concentration of the citizen legions into a force of heavy infantry Rome's armies depended on auxiliary cavalry attachments for support. As a tactical necessity, legions were almost always accompanied by an equal or greater number of lighter auxiliary troops,[45] which were drawn from the non-citizens of the Empire's territories. One known exception of legions being formed from non-citizen provinces during this period was the legion that was raised in the province of Galatia.
After Marius, the legions were drawn largely from volunteer citizens rather than citizens conscripted for duty.[46] Volunteers came forward and were accepted not from citizens of the city of Rome itself but from the surrounding countryside and smaller towns falling under Roman control.[47] Whereas some long-term military professionals were classed as veterans, they were outnumbered by civilians with limited military experience who were in active service perhaps only for a few campaigns.[48] The legions of the late Republic remained, unlike the legions of the later Empire, predominantly Roman in origin, although some small number of ex-auxiliary troops were probably incorporated.[49] The army's higher-level officers and commanders were still drawn exclusively from the Roman aristocracy.
Unlike earlier in the Republic, legionaries were no longer fighting on a seasonal basis to protect their land. Instead, they received standard pay, and were employed by the state on a fixed-term basis. As a consequence, military duty began to appeal most to the poorest sections of society, to whom a salaried pay was attractive.[50] The army therefore consisted of a far higher proportion of the poor – particularly the rural poor – than it had previously.[51] A destabilising consequence of this development was that the proletariat "acquired a stronger and more elevated position" within the state. This professionalisation of the military was necessary to provide permanent garrisons for newly acquired and distant territories such as Hispania, something not possible under an army of seasonal citizen militia.
Historian R. E. Smith notes that there was a need to raise additional legions in an emergency to repel specific strategic threats. He argues that this may have resulted in two types of legion.[52] Long-standing legions deployed overseas were probably professional troops forming a standing army. Quickly-formed new legions, in contrast, consisted of younger men, perhaps with little or no military experience, who hoped for adventure and plunder. However, no distinction in basic pay, discipline or armour is known of between the two types of legion. The practice of veteran troops signing up again voluntarily into newly-raised legions must have meant that no one army conformed exactly to one or other of these theoretical archetypes.
The legions of the late Republic were, structurally, almost entirely heavy infantry. The legion's main sub-unit was called a ''cohort'' and consisted of approximately 480 infantrymen.[53] The cohort was therefore a much larger unit than the earlier ''maniple'' sub-unit, and was divided into six centuriae of 80 men each. Each centuria was separated further into 10 "tent groups" (Latin: ''contubernia'') of 8 men each. Legions additionally consisted of a small body, typically 120 men, of Roman legionary cavalry (Latin: ''equites legionis''). The ''equites'' were used as scouts and dispatch riders rather than battlefield cavalry.[54] Legions also contained a dedicated group of artillery crew of perhaps 60 men, who would operate devices such as ''ballistae''.
Each legion was normally partnered with an approximately equal number of allied (non-Roman) ''auxiliae'' troops.[55] The addition of allied troops to the Roman army was a formalisation of the earlier arrangement of using light troops from the Socii and Latini, who had received Roman citizenship after the Social War.[56] Auxiliary troops could be formed from either auxiliary light cavalry known as ''alae'', auxiliary light infantry known as ''cohors auxiliae'', or a flexible mixture of the two known as ''cohors equitata''. Cavalry types included mounted archers (Latin: ''sagittarii''), heavy shock cavalry (Latin: ''cataphractii'' or ''clibanarii''), or lancers (Latin: ''antesignani'' or ''lancearii''). Infantry could be armed with bows, slings, throwing spears, long swords, or thrusting spears. Auxiliary units were originally led by their own chiefs, and, in this period, their internal organisation was left to their commanders.[57]
However, ''"the most obvious deficiency"'' of the Roman army remained its shortage of cavalry, especially heavy cavalry;[58] even auxiliary troops were predominantly infantry. Luttwak argues that auxiliary forces largely consisted of Cretan archers, Balearic slingers and Numidian infantry, all of whom fought on foot.[59] As Rome's borders expanded and its adversaries changed from largely infantry-based to largely cavalry-based troops, the infantry-based Roman army began to find itself at a tactical disadvantage, particularly in the East.
After having declined in size following the subjugation of the Mediterranean, the Roman navy underwent short-term upgrading and revitalisation in the late Republic to meet several new demands. Under Caesar, an invasion fleet was assembled in the English Channel to allow the invasion of ''Britannia''; under Pompey, a large fleet was raised in the Mediterranean Sea to clear the sea of Cilician pirates. During the civil war that followed, as many as a thousand ships were either constructed or pressed into service from Greek cities.
Non-citizen recruitment (49 BC – 27 BC)
By the time of Julius Caesar in 54 BC, regular legionary units were supplemented by ''exploratores'', a body of scouts, and ''speculatores'', spies who infiltrated enemy camps.[60]
Due to the demands of the civil war, the extraordinary measure of recruiting legions from non-citizens was taken: by Caesar in Transalpine Gaul (Latin: ''Gallia Transalpina''), by Brutus in Macedonia and by Pompey in Pharsalus.[61] This irregular and extraordinary recruitment was not, however, typical of recruitment during this period, and Roman law still officially required that legions were recruited from Roman citizens only.
Imperial legions and reformation of the auxilia (27 BC – 75 AD)
Marble bas-relief carving of soldiers of the Praetorian Guard of Augustus, circa 1st-century AD
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Bas-relief carving of a Roman legionary out of battle dress, circa 1st century AD
By the turn of the millennium, Emperor Augustus' primary military concern was to prevent Roman generals from further usurping the imperial throne.[62] The experience of Caesar and, earlier, Marius and Sulla, had demonstrated the willingness of "emergency" (re-actively raised) legions containing troops keen for plunder to follow their generals against the state. Augustus therefore removed the need for such emergency armies by increasing the size of the standing armies to a size sufficient to provide territorial defence on their own.[63] Perhaps due to similar concerns, the legions and auxiliaries of the army were supplemented under the emperor Augustus by an elite formation of guards dedicated to the protection of the Emperor. The first such unit was based in Rome and were known as the Praetorian Guard, and a second similar formation were known as the Cohortes urbanae.[64][65]
The legions, which had been a mix of life professionals and civilian campaigners, was altered into a standing army of professionals only.[66] The actual structure of the cohort army remained much the same as in the late Republic, although around the first century AD the first cohort of each legion was doubled in size to a total of 960 soldiers.[67] However, while the structure of the legions remained much the same, their make-up gradually changed. Whereas early Republican legions had been raised by a draft from eligible Roman citizens, imperial legions were recruited solely on a voluntary basis and from a much wider base of manpower. Likewise, whereas Republican legions had been recruited almost exclusively in Italy, early Imperial legions drew most of their recruits from Roman colonies in the provinces from 68 AD onwards. One estimate places the proportion of Italian troops at 65% under Augustus in ''circa'' 1 AD, falling to around 49% by the end of Nero's reign.[68]
Since the legions were officially open only to Roman citizens, Cary and Scullard argue that at least in some provinces at this time "many provincials must have been recruited who lacked any genuine claim to Roman citizenship but received it unofficially on enlistment",[69] a practice that was to increase in the second century.[70]This is most likely in those provinces where the pool of Roman citizens was not large enough to fulfil the provincial army's recruitment needs. One possible example is Britain, where one estimate puts the citizen pool in the first century at only 50,000 out of a total provincial population of around two million.[71]
At the same time as the legions underwent these transformations, the ''auxilia'' were reorganised and a number of allied troops were formalised into standing units similar to legions. Rather than being raised re-actively when required, the process of raising auxiliary troops was carried out in advance of conflicts according to annual targets.[72] Whereas the internal organisation of the ''auxilia'' had previously been left up to their commanders, in the early empire they were organised into standardised units known as ''turmae''. Although never becoming as standardised in their equipment as the legions,[73] and often retaining some national flavour, the size of the units at least was standardised to some degree. Cavalry were formed into either an ''ala quingenaria'' of 512 horsemen, or an ''ala millaria'' of 1000 horsemen. Likewise, infantry auxilia could be formed into a ''cohors quingenaria'' of 500 men or a ''cohors millaria'' of 1000 men. Mixed cavalry/infantry auxiliaries were typically formed with a larger proportion of foot than horse troops: the ''cohors equitata quingenaria'' consisted of 380 foot and 120 horsemen, and the ''cohors equitata millaria'' consisted of 760 foot and 240 horsemen.
The vitality of the empire at this point was such that the use of native ''auxilia'' in the Roman army did not apparently barbarise the military as some scholars claim was to happen in the late empire.[74] On the contrary, those serving in the ''auxilia'' during this period frequently strove to Romanise themselves. They were granted Roman citizenship on retirement, granting them several social advantages, and their sons became eligible for service in the legions.[75]
As with the army, many non-Italians were recruited into the Roman Navy, partly because the Romans had never readily taken to the sea.[76] It appears that the navy was considered to be slightly less prestigious than the ''auxilia'' but, like the ''auxilia'', troops could gain citizenship on discharge upon retirement. In terms of structure, each ship was staffed by a group of men approximately equivalent to a century, with ten ships forming a naval squadron.
Introduction of vexillationes (76 AD – 117 AD)
Roman soldiers of around 101 AD from a cast of Trajan's column, circa 113 AD
By the final years of the first century AD, the legions remained the backbone of the Roman army, although the ''auxilia'' in fact outnumbered them by up to half as much again.[77] Within the legions, the proportion of troops recruited from within Italy fell gradually after 70 AD.Hassall, ''The High Empire, AD 70–192'', p. 331 By the close of the first century, this proportion had fallen to as low as 22 percent, with the remainder drawn from conquered provinces. Since technically only citizens were allowed to enlist in the legions, where recruits did not possess citizenship then in at least some instances citizenship ''"was simply given [to] them on enlistment"''.[78] During this time, the borders of the Empire had remained relatively fixed to the extent originally reached under the emperor Trajan. Because of this, the army was increasingly responsible for protecting existing frontiers rather than expanding into foreign territory, the latter of which had characterised the army's earlier existence.[79] As a result, legions became stationed in largely fixed locations. Although entire legions were occasionally transferred into theatres of war, they remained largely rooted in one or more legionary bases in a province, detaching into smaller bodies of troops (Latin: ''vexillationes'') on demand.[80] This policy eventually led to a split of the military's land-based forces into mobile and fixed troops in the later Empire. In general, the best troops were dispatched as ''vexillationes'', and the remainder left to guard border defences were of lower quality, perhaps those with injuries or near retirement.[81]
Barbarisation of the army (117 AD – 253 AD)
Late second-century Roman soldiers battling Germanic troops, as depicted on a contemporary Roman sarcophagus, circa 190 AD
Third-century Roman soldiers battling Gothic troops, as depicted on a contemporary Roman sarcophagus, circa 250 AD
By the time of the emperor Hadrian the proportion of Italians in the legions had fallen to just one percent and it had ''"become common to fill up [legionary] detachments by local conscription"''[82] This lowest figure is probably a direct result of the changing needs of military staffing: a system of fixed border defences (Latin: ''limes'') were established around the empire's periphery under Hadrian, consolidating Trajan's territorial gains. These called for troops to be stationed permanently in the provinces, a prospect more attractive to locally-raised than Italian troops.[83] The majority of the troops in the legions at the start of the third century AD were from relatively Romanised (though non-Italian) Illyria.[84] As the century progressed, more and more barbarians (Latin: ''barbari'') were permitted to settle inside of, and tasked with aiding in the defence of, Rome's borders. As a result, greater numbers of barbarous and semi-barbarous peoples were gradually admitted to the army.
However, whether this regionalisation of the legions was partnered by a drop in the professionalism of the troops is contested. Santosuosso argues that the strict discipline of the days of Marius had lapsed,[85] but Alfoldi states that the Illyrian troops were both valiant and warlike, and Tacitus described German recruits as being natural mercenaries (Latin: ''vivi ad arma nati'').[86] It seems that discipline in the legions did slacken, with soldiers granted permission to live with wives outside of military lodgings and permitted to adopt a more lavish and comfortable lifestyle, in contrast to the strict military regimen of earlier years. However, it is by no means certain that this led to any reduction in the effectiveness of the legions, due to the greater ferocity and stature of the ''barbari'' recruits. The flavour of the Roman military, however, was now dictated by the increasing number of regional recruits, leading to a perceived barbarisation of Rome's military forces beginning in this period.[87] The barbarisation of the lower ranks was paralleled by a concurrent barbarisation of its command structure, with the Roman senators who had traditionally provided its commanders becoming entirely excluded from the army. By 235 AD the Emperor himself, the figurehead of the entire military, was a man born outside of Italy to non-Italian parents.[88]
| "A young nobleman, strong of hand and quick of mind and far more intelligent than your average barbarian... the ardour of his face and eyes showed the burning spirit within. He had fought on our side in previous campaigns and earned the right to become a Roman citizen; indeed, he was even elevated to the rank of Equestrian." |
| ''Velleius, ''Paterculus'', 2.108'' |
The gradual inclusion of greater numbers of non-citizen troops into the military was taken a further step by the creation under Hadrian of a new type of force in addition to the legions and ''auxilia'', known as ''numerii''. Formed in bodies of around 300 irregular troops, the ''numerii'' were drawn from subjugate provinces and peoples of client-states or even from beyond the borders of the empire. They were both less regimented and less Romanised than auxiliary troops, with a "pronounced national character",[89] including native dress and native war cries. The introduction of the ''numerii'' was a response to the need for cheap troops, who were nevertheless fierce and provided a force balance of light infantry and cavalry.[90] They were therefore largely less well armed and less well trained than ''auxilia'' or legions, although more prestigious elite irregular native troops were also utilised.[91] However, the legions still made up around one half of the Roman army at this point.
Successive crises (238 AD – 284 AD)
A 6th-century carving of a Sassanid armoured knight, the model for the Roman ''catafracatarii''
By the late Empire, enemy forces in both the East and West were "sufficiently mobile and sufficiently strong to pierce [the Roman] defensive perimeter on any selected axis of penetration";[92] from the third century onwards, both Germanic tribes and Persian armies pierced the frontiers of the Roman Empire.[93] In response, the Roman army underwent a series of changes, more organic and evolutionary than the deliberate military reforms of the Republic and early Empire. A stronger emphasis was placed upon ranged combat ability of all types, such as field artillery, hand-held ''ballistae'', archery and darts. Roman forces also gradually became more mobile, with one cavalryman for every three infantryman, compared to one in forty in the early Empire.[94][95] Additionally, the emperor Gallienus took the revolutionary step of forming dedicated cavalry regiments, separating them from the mixed cavalry and infantry regiments of the past.[96][97] A diverse range of cavalry regiments existed, including ''catafractarii'' or ''clibanarii'', ''scutarii'', and legionary cavalry known as ''promoti''. Collectively, these regiments were known as ''equites''. Around 275 AD, the proportion of ''catafractarii'' was also increased. There is some disagreement over exactly when the relative proportion of cavalry increased, whether Gallienus' reforms occurred contemporaneously with an increased reliance on cavalry, or whether these are two distinct events. Alfoldi appears to believe that Gallienus' reforms were contemporaneous with an increase in cavalry numbers. He argues that, by 258, Gallienus had made cavalry the predominant troop type in the Roman army in favour of heavy infantry, which dominated earlier armies.According to historian Warren Treadgold, however, the proportion of cavalry did not change between the early 3rd and early 4th centuries.[98]
Larger groups of ''barbari'' began to settle in Rome's territories around this time, and the troops they were contracted to provide to the Roman army were no longer organised as ''numeri'' but rather were the forerunners of the later rented native armies known as federated troops (Latin: ''foederati'').[99] Though they served under Roman officers, the troops of these units were far more barbarised than the ''numeri'', lacked Romanisation of either military structure or personal ideology, and were ineligible for Roman citizenship upon discharge. These native troops were not permitted to fight in native war bands under their own leaders, unlike the later ''foederati''; instead, these troops were split into small groups attached to other Roman units.[100] They existed therefore as a halfway house between ''numeri'', who were encouraged to be Romanised, and the ''foederati'', who raised officers from their own ranks and were almost entirely self-dependent.
Comitatenses and limitanei (284 AD – 358 AD)
Bearded Roman troops as pictured on a triumphal arch, circa 312 AD
A distinction between frontier guard troops and more mobile reserve forces had emerged with the use of certain troops to permanently man frontiers such as Hadrian's Wall in ''Britannia'' in the second century AD, and may have extended as far back as the late Republic's use of "provincial" and "emergency" legions. By the late Empire the competing demands of manned frontiers and strategic reserve forces had led to a division of the military into four types of troops. Border fortifications were manned by a ''"settled and hereditary"'' militia (Latin: ''limitanei'' or ''riparienses'' ) that were ''"tied to their posts"''.[101] In the rear lay more mobile troops in field armies known as the ''comitatenses'', which were held in strategic reserve.[102][103] Somewhere between the two were more local provincial reserves known as ''cunei'' (cavalry) and ''auxilia'' (by this time, referring to infantry alone) that may have evolved from earlier auxiliary cavalry units.[104] From the time of the emperor Constantine there were also two small central reserves (Latin: ''scholae'') held to the strategic rear even of the ''comitatenses'', one each in the presence of the emperors of West and East respectively. Created and expanded from the core troops of the emperor's personal bodyguards, the central field armies by 295 AD seem to have been too large to be accounted for as simple bodyguard forces, but were still too small to be able to campaign independently of legionary or vexillation support.[105]
Of the four troop types, the ''limitanei'' (border guards) are generally considered to have been of the lowest quality,[106][107][103] consisting largely of peasant-soldiers that were both ''"grossly inferior"'' to the earlier legions and inferior also to their counterparts in the mobile field armies.[109]
While the ''limitanei'' were supposed to deal with policing actions and low-intensity incursions, the duty of responding to more serious incidents fell upon the provincial troops. The countering of the very largest scale incursions on a strategic scale was the task of the ''comitatenses'' or mobile field troops, possibly accompanied by the emperor's ''scholae''. Both border and field armies consisted of a mix of infantry and cavalry units[110] although the weight of cavalry was, according to some authorities, greater in the mobile field armies. Overall, approximately one quarter of the army consisted of cavalry troops[111] but their importance is uncertain. Older works such as the Eleventh Edition of the Encyclopedia Britannica (1911) state that the Roman military of the late Empire was ''"marked by that predominance of the horseman which characterised the earlier centuries of the Middle Ages"'', but many more recent authors believe that the infantry remained predominant.[112][113]
There is some dispute about whether this new military structure was put into place under the emperor Diocletian or Constantine since both reorganised the Roman Army in the late 3rd and early 4th centuries to some degree.[114] Both Diocletian and even his predecessor of thirty years Gallienus may already have controlled mobile strategic reserves to assist the empire's border forces;[105][116] either Diocletian or Constantine I expanded this nascent force into permanent field armies.[117]
Recruitment from amongst Roman citizens had become greatly curtailed as a consequence of a declining population,[118][119][111] ''"crippingly numerous"'' categories of those exempted from military service and the spread of Christianity with its pacifist message.[121][122] Together, these factors culminated in ''"the withdrawal of the urban class from all forms of military activity"''.[123] In their place, much of Rome's military were now recruited from non-Italian peoples living within the empire's borders. Many of these people were barbarians or semi-barbarians recently settled from lands beyond the empire,[111] including several colonies of ''Carpi'', ''Bastarnae'' and ''Sarmatians''.[125]
Although units described as ''legiones'' existed as late as the fifth century in both the border and field armies,[126] the legionary system was very different from that of the principate and early empire. Since the term legion continued to be used, it is unclear exactly when the structure and role of the legions changed. Sometime during the third and forth centuries, however, the legions' role as elite heavy infantry was substantially reduced[127] and may have evaporated entirely.[128] Instead, those "legions" that remained were no longer drawn exclusively (and perhaps hardly at all) from Roman citizens. Either Diocletian[129] or Constantine reorganised the legions into smaller infantry units who, according to some sources, were more lightly armoured than their forebears.[127] Their lighter armament may have been either because they ''"would not consent to wear the same weight of body armour as the legionaries of old"''[131] or, as in at least one documented instance, because they were prohibited from wearing heavy armour by their general in order to increase their mobility.[132] Fourth-century legions were at times only one sixth the size of early imperial legions, and they were armed with some combination of spears, bows, slings, darts and swords, reflecting a greater contemporary emphasis on ranged fighting. The ''auxilia'' and ''numeri'' had also largely disappeared.[133] Constantine further increased the proportion of German troops in the regular army,[134] their cultural impact so great that even legionaries began wearing German dress.
Adoption of barbarian allies (358 AD – 395 AD)
By the late 4th century, the Empire had become chronically deficient in raising sufficient troops from amongst its own population. As an alternative, taxation raised internally was increasingly used to subsidise growing numbers of barbarian recruits. The Romans had, for some time, recruited individual non-Roman soldiers into regular military units. In 358 AD, this practice was accelerated by the wholescale adoption of the entire Frankish people into the Empire, providing a ready pool of such recruits. In return for being allowed to settle as ''foederati'' in northern ''Gallia'' on the near side of the Rhine, the Franks were expected to defend the Empire's borders in their territory and provide troops to serve in Roman units.
In 376, a large band of Goths asked Emperor Valens for permission to settle on the southern bank of the Danube river on terms similar to the Franks. The Goths were also accepted into the empire as ''foederati''; however, they rebelled later that year and defeated the Romans at the Battle of Adrianople. The heavy losses that the Roman military suffered during this defeat ironically forced the Roman Empire to rely still further on such ''foederati'' troops to supplement its forces.[135] In 382 AD, the practice was radically extended when federated troops were signed up ''en masse'' as allied contingents of ''laeti'' and ''foederatii'' troops separate from existing Roman units.
The size and composition of these allied forces remains in dispute. Santosuosso argues that ''foederati'' regiments consisted mostly of cavalry[136] that were raised both as a temporary levy for a specific campaign need and, in some cases, as a permanent addition to the army. Historian Hugh Elton believes that the importance of ''foederati'' has been overstated in traditional accounts by historians such as A.H.M. Jones. Elton argues that the majority of soldiers were probably non-Italian Roman citizens,[137] while Santosuosso believes that the majority of troops were almost certainly non-citizen ''barbari''.[138]
Collapse in the West and survival in the East (395 AD – 476 AD)
Mosaic of what is presumed to be a Gothic war leader. The Goths were employed as ''foederati'' by the Romans in the 5th century
The non-federated mobile field army, known as the ''comitatenses'', was eventually split into a number of smaller field armies: a central field army under the emperor's direct control, known as the ''comitatense palatina'' or ''praesental'', and several regional field armies. Historians Santosuosso and Vogt agree that the latter gradually degraded into low-quality garrison units similar to the ''limitanei'' that they either supplemented or replaced. By the fifth century, a significant portion of Western Rome's main military strength lay in rented Barbarian mercenaries known as ''foederatii''.
| "We received a terrible rumour about events in the West. They told us that Rome was under siege, and the only safety for its citizens was that which they could buy with gold, and when that had been stripped from them, they were besieged again, so that they lost not only their possessions, but also their lives. Our messenger gave the news in a faltering voice, and could hardly speak for sobbing. The city which had captured the world was now itself captured" |
| ''Jerome, ''Letters'', 127'' |
As the fifth century progressed, many of the Empire's original borders had been either wholly or partially denuded of troops to support the central field army; some areas, such as ''Britannia'', were abandoned entirely.[139] In 395, the Western Roman Empire had several regional field armies in Italy, ''Illyricum'', ''Gallia'', ''Britannia'' and ''Africa'', and about twelve border armies. By about 430, two more field armies were established in ''Hispania'' and ''Tingitania'' but the Romans had lost control of ''Britannia''[140] as well as much of ''Gallia'', ''Hispania'', and ''Africa''. In the same period, the Eastern Roman Empire had two field armies ''In the Emperor's Presence'' (at Constantinople), three regional field armies (in the East, in Thrace, and in Illyricum) and fifteen frontier armies.[141]
As Roman troops were spread increasingly thin over its long border, the Empire's territory continued to dwindle in size. Barbarian war bands increasingly began to penetrate the Empire's vulnerable borders, both as settlers and invaders. In 451, the Romans defeated Attila the Hun, but only with assistance from a confederation of ''foederatii'' troops, which included Visigoths and Alans. As barbarian incursions continued, some advancing as far as the heart of Italy, Rome's borders began to collapse, with frontier forces swiftly finding themselves cut off deep in the enemy's rear.[142]
Simultaneously, barbarian troops in Rome's pay came to be ''"in a condition of almost perpetual turbulence and revolt"''[143] from 409 AD onwards. In 476 AD these troops finally unseated the last emperor of the Western Roman Empire.[144] The Eastern Roman military (now the Byzantine army and Byzantine navy) continued to defend the Eastern Roman empire (now the Byzantine Empire) until its fall in 1453.[145]
References
Footnotes
Citations
1. ''Encyclopedia Britannica'', Eleventh Edition (1911), ''The Roman Army''
2. Goldsworthy, ''In the Name of Rome'', 2003, p. 18
3. Cary & Scullard, ''A History of Rome'', p. 9
4. Cary & Scullard, ''A History of Rome'', p. 11
5. Grant, ''The History of Rome'', p. 22
6. Boak, ''A History of Rome to 565 A.D.'', p. 69
7. Boak, ''A History of Rome to 565 A.D.'', p. 69
8. Boak, ''A History of Rome to 565 A.D.'', p. 86
9. Pallottino,''The Etruscans'', p. 68
10. Livy, ''The Rise of Rome'', Book 5, chapter 33
11. Livy, ''The Rise of Rome'', Book 1, chapter 42
12. Livy, ''The Rise of Rome'', Book 1, chapter 43
13. Smith, ''Service in the Post-Marian Roman Army'', p. 10
14. Boak, ''A History of Rome to 565 A.D.''. p. 69
15. Gabba, ''Republican Rome, The Army And the Allies'', p. 2
16. Grant, ''The History of Rome'', p. 334
17. Boak, ''A History of Rome'', p. 454
18. Campbell, ''The Crisis of Empire'', p. 126
19. Boak, ''A History of Rome'', p. 454
20. Vogt, ''The Decline of Rome'', p. 158
21. Gabba, ''Republican Rome, The Army And the Allies'', p. 5
22. Boak, '' A History of Rome to 565 A.D.'', p. 69
23. Grant, ''The History of Rome'', p. 24
24. Grant, ''The History of Rome'', Faber and Faber, 1979 p. 54
25. Boak, '' A History of Rome to 565 A.D.'', p. 87
26. Santosuosso, ''Storming the Heavens'', p. 10
27. Boak, ''A History of Rome to 565 A.D.'', p. 69
28. Santosuosso, ''Storming the Heavens'', p. 18
29. Polybius, ''History'', Book 6
30. Luttwak, ''The Grand Strategy of the Roman Empire'', p. 40
31. Livy, ''The Rise of Rome'', Book 5, ch. 1
32. Webster, ''The Roman Imperial Army'', p. 156
33. Smith, ''Service in the Post-Marian Roman Army'', p. 2
34. Gabba, ''Republican Rome, The Army And the Allies'', p. 5
35. Gabba, ''Republican Rome, The Army and The Allies'', p. 7
36. Gabba, ''Republican Rome, The Army and The Allies'', p. 9
37. Santosuosso, ''Storming the Heavens'', p. 11
38. Webster, ''The Roman Imperial Army'', p. 143
39. Santosusso, ''Storming the Heavens'', p. 10
40. Boak, ''A History of Rome to 565 A.D.'', p. 189
41. Gabba, ''Republican Rome, The Army And the Allies'', p. 1
42. Cary & Scullard, ''A History of Rome'', p. 219
43. Luttwak, ''The Grand Strategy of the Roman Empire'', p. 27
44. Santosuosso, ''Storming the Heavens'', p. 16
45. Tacitus, ''Annals'', IV, 5
46. Luttwak, ''The Grand Strategy of the Roman Empire'', p. 16
47. Santosuosso, ''Storming the Heavens'', p. 29
48. Santosuosso, ''Storming the Heavens'', p. 51
49. Smith, ''Service in the Post-Marian Roman Army'', p. 56
50. Gabba, ''Republican Rome, The Army and The Allies'', p. 25
51. Boak, ''A History of Rome'', p. 189
52. Smith, ''Service in the Post-Marian Roman Army'', p. 29
53. Luttwak, ''The Grand Strategy of the Roman Empire'', p. 14
54. Webster, ''The Roman Imperial Army'', p. 116
55. Luttwak, ''The Grand Strategy of the Roman Empire'', p. 15
56. Smith, ''Service in the Post-Marian Roman Army'', p. 27
57. Webster, ''The Roman Imperial Army'', p. 146
58. Luttwak, ''The Grand Strategy of the Roman Empire'', p. 43
59. Luttwak, ''The Grand Strategy of the Roman Empire'', p. 44
60. Santosuosso, ''Storming the Heavens'', p. 67
61. Smith, ''Service in the Post-Marian Roman Army'', p. 57
62. Smith, ''Service in the Post-Marian Roman Army'', p. 71
63. Boak, ''A History of Rome to 565 A.D.'', p. 270
64. Luttwak, ''The Grand Strategy of the Roman Empire'', p. 17
65. Grant, ''A History of Rome'', p. 209
66. Santosuosso, ''Storming the Heavens'', p. 91
67. Hassall, ''The Army'', p. 325
68. Santosuosso, Storming the Heavens, p.98
69. Cary & Scullard, ''A History of Rome'', p. 338
70. Gibbon, ''The Decline and Fall of the Roman Empire'', Chapter I, p. 36
71. Mattingly, ''An Imperial Possession - Britain in the Roman Empire'', p. 166–8
72. Webster, ''The Roman Imperial Army'', p. 144
73. Webster, ''The Roman Imperial Army'', p. 152
74. Webster, ''The Roman Imperial Army'', p. 150
75. Webster, ''The Roman Imperial Army'', p. 147
76. Webster, ''The Roman Imperial Army'', p. 165
77. Hassall, ''The High Empire, AD 70–192'', p. 320
78. Gibbon, ''The Delince and Fall of the Roman Empire'', Chapter I, p. 36
79. Alfoldi, ''The Crisis of the Empire'', p. 211
80. Luttwak, ''The Grand Strategy of the Roman Empire'', p. 124
81. Luttwak, ''The Grand Strategy of the Roman Empire'', pp. 153–154
82. Vogt, ''The Decline of Rome'', p. 58.
83. Santosuosso, ''Storming the Heavens'', p. 98
84. Alfoldi, ''The Crisis of the Empire'', p. 208
85. Santosuosso, ''Storming the Heavens'', p. 173
86. Tacitus, ''History'', 4, 64
87. Santosuosso, ''Storming the Heavens'', p. 174
88. Santosuosso, ''Storming the Heavens'', p. 175
89. Luttwak, ''The Grand Strategy of the Roman Empire'', p. 122
90. Luttwak, ''The Grand Strategy of the Roman Empire'', p. 123
91. Alfoldi, ''The Crisis of the Empire'', p. 216
92. Luttwak, ''The Grand Strategy of the Roman Empire'', p. 176
93. Heather, Peter, ''The Fall of the Roman Empire'', pp. 58–67
94. Elton, ''Warfare in Roman Europe'', p. 94
95. Santosuosso, A., ''Storming The Heavens'', p. 190
96. Vogt, ''The Decline of Rome'', p. 74
97. Grant, ''A History of Rome'', p. 285
98. Treadgold, Warren, ''Byzantium and its Army, 284–1081'', p. 56.
99. Alfoldi, ''The Crisis of the Empire'', p. 212
100. Alfoldi, ''The Crisis of the Empire'', p. 219
101. Vogt, ''The Decline of Rome'', p. 178
102. Vogt, ''The Decline of Rome'', p. 177
103. Boak, ''A History of Rome to 565 AD''. p. 452
104. Luttwak, ''The Grand Strategy of the Roman Empire'', p. 173
105. Campbell, ''The Army'', p. 121
106. Santosuosso, ''Storming the Heavens'', p. 188
107. Grant, ''A History of Rome'', p. 333
108. Boak, ''A History of Rome to 565 AD''. p. 452
109. Luttwak, ''The Grand Strategy of the Roman Empire'', p. 154
110. Cary & Scullard, ''A History of Rome'', p. 534
111. Boak, ''A History of Rome to 565 AD''. p. 451
112. Elton ''Warfare in Roman Europe, A.D. 350–425'', pp. 103, 105–106.
113. Treadgold, ''Byzantium and its Army'', pp. 44–59.
114. Southern & Dixon, ''The Late Roman Army'', pp. 15–38.
115. Campbell, ''The Army'', p. 121
116. Southern & Dixon, ''The Late Roman Army'', pp. 11–17.
117. Southern & Dixon, ''The Late Roman Army'', pp. 15–20 & 37–38.
118. Vogt, ''The Decline of Rome'', p. 25
119. Cary & Scullard, ''A History of Rome'', p. 537
120. Boak, ''A History of Rome to 565 AD''. p. 451
121. Santosuosso, ''Storming the Heavens'', p. 229
122. Gibbon, ''The Decline and Fall of the Roman Empire'', Chapter XXXVIII, p. 622
123. Vogt, ''The Decline of Rome'', p. 59
124. Boak, ''A History of Rome to 565 AD''. p. 451
125. Gibbon, ''The Decline and Fall of the Roman Empire'', Chapter VI, p. 188
126. Luttwak, ''The Grand Strategy of the Roman Empire'', p. 171
127. Boak, ''A History of Rome to 565 AD''. p. 453
128. Luttwak, ''The Grand Strategy of the Roman Empire'', p. 175
129. Brian Campbell, ''The Crisis of Empire'', p. 123
130. Boak, ''A History of Rome to 565 AD''. p. 453
131. Cary & Scullard, ''A History of Rome'', p. 535
132. Alfoldi, ''The Crisis of the Empire'', p. 209
133. Alfoldi, ''The Crisis of the Empire'', p. 213
134. Grant, ''A History of Rome'', p. 310
135. Ammianus Marcellinus, ''Historiae'', book 31, chapters 3–16.
136. Santosuosso, ''Storming the Heavens'', p. 189
137. Elton, Hugh, 1996, ''Warfare in Roman Europe'', pp. 145–152.
138. Santosuosso, ''Storming the Heavens'', p. 192
139. Vogt, ''The Decline of Rome'', p. 188
140. Boak, ''A History of Rome to 565 AD'', p. 474
141. Treadgold, ''Byzantium and its Army, 284–1081'', pp. 43–59.
142. Luttwak, ''The Grand Strategy of the Roman Empire'', p. 188
143. Grant, ''A History of Rome'', p. 344
144. Vogt, ''The Decline of Rome'', p. 250
145. Runciman, ''The Fall of Constantinople: 1453.''
Bibliography
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