The Mark I Tank was the first combat tank in the world. It entered service with the British Army in 1916.
Two versions were made: The 'Male' had 2 x 6 pounder cannon and 3 x Hotchkiss machine guns. The 'Female' had 4 x Vickers machine guns and 1 x Hotchkiss machine gun.
Both had a crew of 8, and a top speed of around 6mph. The 'Male' weighed 28 tons, and the 'Female' 27 tons.