The T-80 is a main battle tank (MBT)[11] that was designed and manufactured in the former Soviet Union and manufactured in Russia. The T-80 is based on the T-64, while incorporating features from the later T-72 and changing the engine to a gas turbine. When it entered service in 1976, it was the first production tank to be powered solely by turbine.The chief designer of the T-80 was Soviet engineer Nikolay Popov.[13] The T-80U was last produced in 2001 in a factory in Omsk, Russia, but in 2023, the CEO of Uralvagonzavod announced that production would restart.[14]The Ukrainian T-80UD diesel engine variant continued to be produced in Ukraine. The T-80 and its variants are in service in Belarus, Cyprus, Egypt, Kazakhstan,[15] Pakistan, Russia, South Korea, Ukraine and Uzbekistan. Ukraine further developed the T-80UD as the T-84.