The Development of the Mark 7 16-Inch Gun on Iowa-Class In the late 1930s, the U.S. commissioned a set of studies for “fast battleship” designs. The General Board, which considered design ...

Roosevelt during his 1943 trip to Casablanca for the Teheran Conference. The Iowa-class battleships will be armed with both offensive and defensive missiles in addition to their original 16-inch guns.