mark i tank
The Mark I Tank was the first tank to enter production during World War I, and the first in the British heavy tank series. It was designed to break the stalemate of trench warfare, and was able to survive small arms fire, crush barbed wire, cross trenches & uneven terrain and assault fortified positions. The British heavy tanks of World War I are notable for their rhomboidal shape and guns mounted in sponsons on either side of the vehicle. The Mark I in particular included a pair of large wheel behind the thank to aid steering, although these proved unsuccessful and were subsequently dropped.
The Mark I Tank entered service in August 1916 and first saw action on 15 September 1916, during the Battle of Flers–Courcelette.