The British developed the tank in response to the trench warfare of World War I. In 1914, a British army colonel named Ernest Swinton and William Hankey, secretary of the Committee for Imperial Defence, championed the idea of an armored vehicle with conveyor-belt-like tracks over its wheels that could break through enemy lines and traverse difficult territory. The men appealed to British navy minister Winston Churchill, who believed in the concept of a “land boat” and organized a Landships Committee to begin developing a prototype. To keep the project secret from enemies, production workers were reportedly told the vehicles they were building would be used to carry water on the battlefield (alternate theories suggest the shells of the new vehicles resembled water tanks). Either way, the new vehicles were shipped in crates labeled “tank” and the name stuck.With a tip of the blogging hat to the elves at NSTAAF.