High Quality Content by WIKIPEDIA articles! During World War II the Allied forces conducted many air raids on Japan which caused extensive destruction to the country`s cities and killed over 300,000 people. These attacks began with the Doolittle Raid in mid-April 1942, but did not resume until June 1944 when United States Army Air Forces (USAAF) B-29 Superfortress heavy bombers began a series of attacks from bases in China. From November 1944 the USAAF conducted a major strategic bombing offensive against Japan which continued until the end of the war. Allied naval and land-based tactical air units also raided Japan during the war`s last months.