bmp-1/-1ak/-2 (estimated)

The BMP-1 is a Soviet amphibious tracked infantry fighting vehicle that has been in service from 1966 to the present. BMP stands for Boyevaya Mashina Pyekhoty 1, meaning "infantry fighting vehicle, 1st serial model". The BMP-1 was the Soviet Union's, and the world's, first mass-produced infantry fighting vehicle (IFV). The development of the BMP was a major break in tradition for the Red Army, which did not field armored and mechanized infantry transporters, like the US M3 half-track, the British Universal Carrier, and the German SdKfz 251, during World War II. The Red Army instead moved to motorized rifle divisions equipped with the BTR-60 family of armored personnel carriers.