The M113A1 is an Armoured Personnel Carrier (APC) in service developed in the United states of America and introduced into Australian Army service in 1964.
The M113 family of vehicles includes seven variants - the APC, Armoured Fitters, Armoured Recovery Vehicle Light, Armoured Ambulance, Armoured Mortar, Armoured Command Vehicle and Armoured Logistic Vehicle.
The M113A1 remained in service with the Australian Army for over 50 years with a heavily modified and 'stretched' Australian version known as the M113AS4 introduced into service from 2007. As of 2022 this vehicle is still in service with the Australian Army and fourteen (14) with the Ukrainian Army.