The BTR-60 armored personnel carrier, the first in the line of Russian 8-wheeled APC's, was developed in the late 1950s to replace the BTR-152 (6x6) APC (see picture #206) and was first seen in public in 1961. It was continuously improved throughout the 1960s culminating in the production of the BTR-60PB, and was subsequently replaced in production by the similar BTR-70 (8x8) (see picture #3941). Numerically, the BTR-60 was the most important vehicle in the Soviet Army. It was issued in quantity to the East German, Bulgarian and Romanian Armies. It has also been exported to Yugoslavia. Significantly, it was the standard armored personnel carrier of the Soviet Naval Infantry i.e. the Soviet Marine Corps.