Re-designated on 1 April 1944 as a B-29 Superfortress Very Heavy bombardment squadron. When training was completed moved to North Field Guam in the Mariana Islands of the Central Pacific Area in January 1945 and assigned to XXI Bomber Command, Twentieth Air Force. Its mission was the strategic bombardment of the Japanese Home Islands and the destruction of its war-making capability. Flew "shakedown" missions against Japanese targets on Moen Island, Truk, and other points in the Carolines and Marianas. The squadron began combat missions over Japan on 25 February 1945 with a firebombing mission over Northeast Tokyo. The squadron continued to participate in wide area firebombing attack, but the first ten-day blitz resulting in the Army Air Forces running out of incendiary bombs. Until then the squadron flew conventional strategic bombing missions using high explosive bombs. The squadron continued attacking urban areas with incendiary raids until the end of the war in August 1945, attacking major Japanese cities, causing massive destruction of urbanized areas. Also conducted raids against strategic objectives, bombing aircraft factories, chemical plants, oil refineries, and other targets in Japan. The squadron flew its last combat missions on 14 August when hostilities ended. Afterwards, its B 29s carried relief supplies to Allied prisoner of war camps in Japan and Manchuria. Squadron remained in Western Pacific, although largely demobilized in the fall of 1945. Some aircraft scrapped on Tinian; others flown to storage depots in the United States. Inactivated as part of Army Service forces at the end of 1945.
It was reactivated as a Strategic Air Command B-52G Stratofortress intercontinental strategic bombardment squadron in 1963, receiving the mission, personnel, aircraft, and equipment of the 301st Bombardment Squadron, which was inactivated. This was part of a Strategic Air Command program to provide units with a combat lineage. The squadron performed operational testing of new equipment at Eglin AFB, between 1963 and 1965; it was reassigned to Barksdale AFB in 1965 and stood nuclear alert duties. It deployed to the western Pacific and engaged in combat operations over Indochina as part of Operation Arc Light. The unit returned to training status and stood nuclear alert after the end of the Vietnam War. Aircraft and personnel of the squadron deployed to 806th Provisional Bombardment Wing at RAF Fairford, England, Jan-Mar 1991. It was inactivated in 1993 as part of the USAF drawdown after the end of the Cold War and retirement of the B-52G.
Operations and decorations
Combat Operations: Conducted bombardment missions against Japan, c. 6 Apr-14 Aug 1945.
Campaigns: World War II: Western Pacific; Air Offensive, Japan.
Decorations: Distinguished Unit Citations: Japan, 10 May 1945; Tokyo and Yokohama, Japan, 23–29 May 1945.
Lineage
Constituted as the 62d Bombardment Squadron on 20 November 1940
Redesignated the 62d Bombardment Squadron, Heavy and activated, on 15 November 1962