Light Tanks of the UK include the Light Tanks Mk II to Mk V. Between the First and Second World Wars, the British produced a series of similar light tanks. They saw use in training, and in limited engagements with British Empire units such as the South African Army during the East African Campaign of 1941. All were around 5 long tons in weight and capable of 30 mph (50 km/h) on roads and around 20 mph (30 km/h) cross-country. Armament was machine gun only—Vickers machine guns firing either a .303 inch or .50 inch calibre round - in a rotating cupola. Suspension was Horstmann coil spring on bogies. The engine was a Meadows 6 cylinder petrol. Up until the Mk V, they had a crew of two: a driver/commander and gunner. The Mk V had a crew of three: a driver, a gunner, and the commander helping o