The Cessna A-37 Dragonfly were developed from the T-37 trainer for the military action in Vietnam. A series of new components such as one GAU-2B/A 7.62mm minigun, two drop tanks on the wing tips, three weapon stations under each wing, stronger landing gear and two more powerful J85 engines were applied to the aircraft. The new A-37A were named by the pilots as 'Super Tweet'.They were sent to Vietnam as the 3th Tactical Fighter Group,604th Air Assault Squadron on 17th July,1967