Douglas A-26 Invader airplane mode, a follow-up airplane to the A-20 Havoc, made its first flight on July 10, 1942. Production delivery began in August 1943, and on November 19, 1944, it went into combat over Europe. It was used for level bombing, ground strafing and rocket attacks. By the time production halted after VJ-Day, 2,502 Invaders had been built.
The A-26 was redesignated the B-26 in 1948. During the Korean War, the airplane entered combat once again, this time as a night intruder to harass North Korean supply lines.
Early in the Vietnam conflict, the Invader went into action for the third time. Also, the USAF ordered 40 modified B-26Bs having more powerful engines and increased structural strength. Designated the B-26K, the airplanes were designed for special air warfare missions. In 1966, the B-26K was redesignated the A-26A.