SIDE ARM

:''For other uses, see sidearm (disambiguation).''
A 'side arm' is a small personal weapon that is typically worn on the body in a holster in such a way to permit immediate access and use. Although this term primarily applies to secondary weapons (as opposed to a primary weapon), it can also apply to swords and other mêlée weapons (eg. the rapier, the katana and wakizashi, the arming sword and the side-sword are all considered sidearms for their respective eras of use); the modern use of it usually pertains to pistols and similar firearms.
A side arm is typically required equipment for law enforcement personnel and military officers. Usually, uniformed personnel of these services wear their weapons openly, while plainclothes personnel typically keep theirs under their outer clothes. However, in some military situations, military officers prefer not to have such a weapon visible as it can identify them as a priority target for snipers.
According to an adventure book written under the pseudonym S. M. Gunn, the Red Army was noteworthy because its officers hardly ever dispensed with their side arms (usually Makarov PMs), considering them equivalent to badges of office. It is unclear whether this tradition is maintained within the armed forces of the presentdayRussian Federation, but it seems likely. This tradition is also seen to varying degrees in other militaries even to the present day, one example being where US Marines during allowed an Iraqi border patrol officer to keep his pistol both as an act of military courtesy and so that he could maintain order over his men.