An armoured personnel carrier (APC) was a type of armoured fighting vehicle (AFV) designed to transport infantry to the battlefield. APCs are colloquially referred to as 'battle taxis' or 'battle buses', among other things. Armoured personnel carriers are distinguished from infantry fighting vehicles by the weaponry they carry.
The Treaty on Conventional Armed Forces in Europe defines them as "an armoured combat vehicle which is designed and equipped to transport a combat infantry squad and which, as a rule, is armed with an integral or organic weapon of less than 20 millimetres calibre." By convention, they are not intended to take part in direct-fire battle, but are armed for self-defence and armoured to provide protection from shrapnel and small arms fire.