Developed and in use from 1917 to 1918, The Charmond Tank was 24 tons. At 20 feet long by 8 feet wide – The vehicle featured close to 8 feet of interior space. Armed with a 75mm Cannon and (4) 8mm Hotchkiss Machine Guns, The Charmond Tank crewed 8. Using a 4-cylinder drive system, it was capable of up to 12 miles per hour. With 400 made, a major problem developed due to it's size ajnd weight. If stuck, the engines were often too weak to extract the vehicle. Iron plating was 1.5 inches thick (and would protect against small arms and light shrapnel). Still, The Charmond was considered an expensive mistake (despite her impressive battle record). They would be replaced by heavier and more effective British Tanks after 1918.