Yeoman is Daniel Brennan, a veteran of the Vietnam War who had a life long vendetta with Vietnamese crime lord Kien Phuc. When Brennan was a US Army captain in the war, Kien was a corrupt South Vietnamese general that betrayed his country and his American allies. Kien was responsible for murdering Brennan's squad and also his pregnant Vietnamese wife. After the war, Brennan spent years in a monastery mastering the art of zen archery. Brennan came back to America in the 1980s and started his vengeance against Kien, now leader of the criminal Shadow Fist Society. Brennan became the vigilante Yeoman, also known as the bow-and-arrow killer. In his career he fought aces, aliens, and all manner of exotic enemies, armed only with his bow and his skills.