The first combat mission took place on 29 May 1945. It was a strike against a Japanese supply depot in Luzon's Cayagan Valley. All three of the Dominators were to take part, but one aborted on takeoff. The other two proceeded to the target. There was no enemy opposition, and bombing runs were made from an altitude of 10,000 feet, and both aircraft returned without incident. This raid was followed by a series of attacks on Japanese targets in the Philippines, in Formosa, and on Hainan Island in the Tonkin Gulf. The only opposition encountered during these missions was some rather inaccurate flak. The tests were thus deemed a success, and plans were made to convert the entire 386th Bombardment Squadron to B-32s. The 312th was scheduled to move to Okinawa as soon as the conversion of the 386th BS to the B-32 was completed.