A specialist in the history of Britain's African colonies, Harry Alfred Gailey served in the U.S. Army Air Forces in World War II, after which he worked as a civil and mechanical engineer. After earning a Ph.D. in history at UCLA in 1958, Gailey taught at Northwest Missouri State University for five years before joining the faculty at San Jose State University, where he taught until he assumed emeritus status. In his retirement, Gailey wrote several books about the Pacific campaigns in World War II.