Tamiya 1/35 WWI British Mk IV Tank Male with motor and WW1 British Figures 30057A Game Changer During WWI, much of Western Europe was reduced to a massive battlefield criss crossed by a seemingly unending network of trenches. The original British Mk. I tank was developed to break the deadlock; the Mk. IV was a later model based on many of the same design principle, and of which around 1,000 were produced starting in March 1917. A "Male" variant was developed to smash through enemy lines and in addition to machine guns it utilized