A cikin 1934, Rundunar Sojan Sama ta Amurka ta ba da buƙata don fashewa tare da nauyin bam da sau biyu na Martin B-10, wanda kawai ya shiga sabis a matsayin mai ba da bom na Sojoji. A cikin kimantawa a Wright Field a shekara mai zuwa, Douglas ya nuna DB-1. Ya yi gasa tare da Boeing Model 299 (daga baya ya zama Boeing B-17 Flying Fortress) da Martin Model 146. Tambaya: Wanene abokin hamayyarsu?
Boeing Model 299 (daga baya ya zama Boeing B-17 Flying Fortress) da kuma Martin Model 146