The discussion cautions against reducing American medium-gun development to the adoption of French 75 mm artillery. The panel identifies three separate American 3-inch development lines that predated that wartime borrowing. One line behind a Second World War anti-tank gun is traced to a coastal-defense weapon intended to engage torpedo craft and also used in an anti-aircraft role. An existing high-velocity gun could migrate between coastal, air-defense, and armored-warfare requirements.
Notable Point · 1:00:53-1:02:07
The older lineages behind American 3-inch guns
American 3-inch weapons followed several development paths, including coastal and anti-aircraft systems that later informed an anti-tank gun.