M3 General Lee - an American medium tank from World War II era, also used by the British army. In the US, known as Lee, in the United Kingdom as Grant. M3 tank was created as a result of the need to replace the obsolete M2 tank, which did not match the WWII battlefield. The serial production began in August 1941. The M3 tank had many components from the M2 light tank, including chassis, Wright R975 EC2 star engine and the shape of the combat compartment.