The Mark IV is a tank of the British Empire.
An upgraded variant of the original Mark One tank, the Mark IV was the mainstay of British forces throughout the later parts of the Great War. Armed with three Lewis machineguns and two six pounder cannons mounted in side sponsons, it was among the most numerous tanks on all the fronts of the war.
Mark IV is the archetypal heavy tank, designed for durability, rather than speed. Its characteristic rhomboid shape ensures that it can climb obstacles with ease, while the firepower of two cannons on both sides offers plenty of force to share with enemies - though, of course, sponsons limit the effective arc of fire.