Organization and training in the United States

The squadron was first activated as the 865th Bombardment Squadron at Wendover Field, Utah on 1 December 1943 as one of the original squadrons of the 494th Bombardment Group, the last heavy bomber group formed by the Army Air Forces.^[1][2] It trained with Consolidated B-24 Liberators at Wendover and at Mountain Home Army Air Field, Idaho. In January and February 1944, a cadre of the squadron trained under simulated combat conditions at Orlando Army Air Base, Florida with the Army Air Forces Tactical Center, with aircrews filling out the squadron in March. The air echelon began to receive new B-24Js in May and they began departing for Hawaii on 28 May.^[3] The ground echelon began its move to Hawaii on 1 June 1944.^[2]

Combat in the Pacific

The squadron remained at Barking Sands Army Air Field for additional training and modifications to its planes to meet theater standards until late September 1944, when it deployed to Angaur Airstrip in the Palau Islands.^[3] The squadron's ground echelon was initially involved with the construction of the base on Angaur.^[2] Although some unit aircrews flew combat missions with the 30th Bombardment Group from Saipan, the air echelon only began to arrive on Angaur on 24 October 1944, after the Seabees and Army engineers had prepared the airstrip for heavy bomber operations.^[3] The squadron finally conducted its first mission on 3 November, when it attacked Japanese airfields on Yap and Koror. Following this, it conducted attacks on Japanese military forces that had been bypassed as American forces had advanced in the Central Pacific. It also attacked the Philippines, hitting gun emplacements, bivouacs, and storage depots on Corregidor and Caballo Islands at the entrance to Manila Bay. Other targets included radio communications installations and power plants at Japanese bases in the Philippines; it also bombed several airfields, including Clark Field on Luzon. Early in 1945, the 865th struck ammunition and supply dumps in the Davao Gulf and Illana Bay areas of Mindanao and airfields on the island.^[2]

The squadron moved to Okinawa in June 1945. From its base at Yontan Airfield it engaged primarily in attacks against enemy airfields on Kyūshū and around the Inland Sea of Japan until V-J Day. It also struck airfields in China and Korea. The unit also participated in incendiary raids and dropped propaganda leaflets over urban areas of Kyūshū. After the war's end, the unit transported personnel and supplies from Manila to Tokyo. In December, the squadron returned to the United States, where it was inactivated at the Vancouver Barracks Port of Embarkation on 6 January 1946.^[1][2]