The backbone of Egypt's Air Force during the 1960s was provided by the delivery of 275 MiG-21s, this being one of the early variants supplied from 1962. Heavy losses in training and transfers to other Arab air forces halved this number by the time of the Six Day War in 1967, when most remaining aircraft were destroyed on the ground. Resupply of Czech-built and more advanced MiG -21 versions followed, along with Chinese J-7s later on. The last MiG-21s operated up until around 2010