The Squadron Signal Publications "In Action" books provide enthusiasts, historians and modelers with outstanding photographic coverage over a wide range of selected subjects. Images are drawn from many private collections and archives to depict the title feature in its historical surroundings. In addition, each volume features original cover art, full color profiles, detailed scale drawings, scrap art and essential descriptive text to bring these histories to life. Learn all about the Douglas A-26 Invader which was a United States twin-engine light bomber and attack aircraft built by Douglas Aircraft during World War II that also saw service during several of the Cold War's major conflicts. Douglas started the A-26 in 1941. The Douglas A-26 (now called the B-26) bomber was the only American bomber to fly missions in three wars. After World War II, it served as a first-line bomber during the Korean War and during the Vietnam War. The last U.S. military Invader was retired in 1972 and donated to the Smithsonian's National Air and Space Museum.