Various models of the German made Leopard have been Canada's main battle tank since the 1970s. The Leopard C2 is an upgrade of the original Leopard C1, as a response to the introduction of new Soviet tanks starting in the 1970s and 1980s. Turrets from more modern German Leopards provided improved targeting systems for the tank's weapons. The addition of armor improved protection for its crews. Between 2006 and 2011, Canada used Leopard C2s in combat for the first time, in support of operations in Kandahar, Afghanistan.