The M22 Locust was a 7.4 ton light tank. It held a turret mounted 37mm cannon and a coaxial M1919A6 machinegun. It was developed by the US at the request of the British military, and used by the British near the end of WW2....
The USS Monitor was an ironclad warship used by the Union Navy during the US Civil War. It was a radical design that sat low on the waterline to present a very small target, and had a revolving turret rather than a broadside battery. The turret traversed with steam power, being about to make a full rotation in just under 23...