The Mi-8 (NATO reporting name "Hip") is a Soviet multi-role helicopter designed by Mil in the 1960s. Its main function is as a transport helicopter, but certain models can also be fitted with armament such as anti-tank rockets. It is the world's most produced helicopter. It was historically used by communist bloc states, such as Warsaw Pact nations, North Korea, North Vietnam, Yugoslavia, etc. though is today used by over 50 countries. A derived variant, the Mi-17 was also developed and used for the Soviet War in Afghanistan. It was the basis for the Mi-24 Hind.