Comparing: KV-13 vs. T-54 vs. STB-1

Development was started in the fall of 1941, under the initiative of Semyon Ginsburg. After successful trials in the fall of 1942, the development of a second prototype was begun.

The first prototype was constructed at the end of 1944. After successful trials in 1945–1947 the T-54 mod. 1947 was adopted for service. 713 vehicles were constructed before production was phased out. In 1949 production of a new variant was launched.

In the early 1960s, Mitsubishi started development of a new tank that complied with government requirements for armament and defense. The first two prototypes of the STB-1 were manufactured in September 1969 for trials. In 1970 the prototypes were shown to journalists and participated in a military parade.