The Medium Tank M3 was an American tank used during World War II. In Britain the tank was called by two names based on the turret configuration. Tanks employing US pattern turrets were called the "General Lee", named after Confederate General Robert E. Lee. Variants using British pattern turrets were known as "General Grant", named after U.S. General Ulysses S. Grant.
About this creation
The M3 was the solution to the Army's lack of armor early in WWII. The Grant's design was unusual because the main weapon — a larger caliber, low-velocity 75 mm gun — was in an offset sponson mounted in the hull with limited traverse. A small turret with a lighter, high-velocity 37 mm gun sat on the tall hull. (wikipedia)