The US military relied on air superiority during World War II. Anti-aircraft defense of the troops provided towed cannons, or. self-propelled anti-aircraft devices M16 MGMC on halftrack landing gear. Only at the end of the war did the anti-aircraft tanks M19 with a double cannon Bofors caliber 40 mm on the chassis of the M24 Chaffee tank get into production. However, the end of the war caused less than 300 pieces to be built.