The T-80 is a third-generation main battle tank (MBT) designed and manufactured in the Soviet Union. A development of the T-64, it entered service in 1976 and was the first production tank to be equipped with a gas turbine engine for main propulsion. The T-80 and further-developed T-84 continue to be produced in Ukraine. The T-80 and its variants are in service in Belarus, Cyprus, the Soviet Union, Ukraine and Yemen. The chief designer of the T-80 was the Russian engineer Nikolay Popov.