How did the guns operate? How was the fuel stored? What were conditions like inside? Find out with this animated version of a Mark 1 Tank.

Spearheaded by visionaries like Colonel Ernest Swinton and engineer William Tritton, Britain's early tank development efforts ...

It was the first completed tank in history but it never went out to war. The British Mark I tank was used in September 1916. It held ten men and reached speeds of almost four miles per hour.