On 6 September, 1915, the prototype British Mark I Tank rolled off the assembly line. “Little Willie” was 14 tons, underpowered, routinely overheated, and couldn’t traverse a trench: its raison d’etre. Even though Littlle Willie was a far cry from the Battlefield Dominating, Fire Breathing Iron Leviathans we have today, he would eventually evolve into the British Mark IV tank that made its debut a year later on the battlefields of the First World War.

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