One of the few aircraft designed from the start for tactical support, the A-37 arrived in Vietnam toward the end of the 1960s and was mainly used in support of helicopter operations. Capable of mounting a wide range of weapons, it proved highly adaptable to diverse operational needs. Particularly effective were its low-level napalm bomb attacks. A fairly limited number of machines, under the colors of both the USAF and the VNAF (the illustration shows the VNAF insignia), were used in action.