Comparing: 121 vs. Leopard 1

Development began in 1962 on a new medium tank based on the Type 59. The new tank was expected to feature improvements in firepower and armor protection. However, the project was canceled shortly after. Some technical innovations were applied later, in the development of the Type 69 tank. All 121 tank prototypes were destroyed during Chinese nuclear weapon testing.

Main battle tank of the Federal Republic of Germany. Development was started in 1956. The first prototypes were built in 1965 at the Krauss-Maffei factory. The Leopard 1 saw service in the armies of more than 10 countries.