German factories and industry was devastated by the end of World War II, but by the 1950s, the nation began to look at designing new tanks. The next tank design started as a collaborative project between Germany and France in the 1950s,[5] but the partnership ended, and the final design was ordered by the Bundeswehr, production of the German Leopard 1 starting in 1965. In total, 6,485 Leopard I tanks were built, of which 4,744 were battle tanks and 1741 were utility and anti-aircraft variants, not including eighty prototypes and pre-series vehicles.