Constituted as 330th Bombardment Group (Heavy) on 1 Jul 1942 and activated on 6 Jul. Assigned to Second AF. Functioned as an operational training and later as a replacement training unit, using B-24 aircraft. Inactivated on 1 Apr 1944.
Redesignated 330th Bombardment Group (Very Heavy). Activated on 1 Apr 1944. Prepared for combat with B-29's. Moved to Guam, Jan-Apr 1945, and assigned to Twentieth AF. Entered combat on 12 Apr 1945 with an attack on the Hodogaya chemical plant at Koriyama, Japan. From Apr to May 1945, struck airfields from which the Japanese were launching suicide planes against the invasion force at Okinawa. After that, operations were principally concerned with incendiary attacks against urban-industrial areas of Japan. Received a DUC for incendiary raids on the industrial sections of Tokushima and Gifu and for a strike against the hydroelectric power center at Kofu, Japan, in Jul 1945. Received another DUC for attacking the Nakajima-Musashino aircraft engine plant near Tokyo in Aug 1945. Dropped food and supplies to Allied prisoners and participated in several show-of-force missions over Japan after the war. Returned to the US, Nov-Dec 1945. Inactivated on 3 Jan 1946.
Redesignated 330th Bombardment Group (Medium). Allotted to the reserve. Activated on 27 Jun 1949. Ordered to active duty on 1 May 1951. Inactivated on 16 Jun 1951.
Redesignated 330th Troop Carrier Group (Medium) and allotted to the reserve. Activated on 14 Jun 1952. Inactivated on 14 Jul 1952.
Squadrons. 457th: 1942-1944; 1944-1945; 1949-1951; 1952. 458th: 1942-1944; 1944-1945; 1952. 459th: 1942-1944; 1944-1945; 1952. 460th: 1942-1944; 1944.
Stations. Salt Lake City AAB, Utah, 6 Jul 1942; Alamogordo, NM, 1 Aug 1942; Biggs Field, Tex, 5 Apr 1943-1 Apr 1944. Walker AAFld, Kan, 1 Apr 1944-7 Jan 1945; North Field, Guam, 18 Feb-15 Nov 1945; Camp Stoneman, Calif, unkn-3 Jan 1946. March AFB, Calif, 27 Jun 1949-16 Jun 1951. Greater Pittsburgh Aprt, Pa, 14 Jun-14 Jul 1952.
Commanders. Maj Leroy A Rainey, 1 Aug 1942; Lt Col John R Sutherland, 5 Sep 1942; Lt Col John A Way, 1 Dec 1942; Lt Col Samuel C Mitchell, 6 Mar 1943; Lt Col Frank P Bostrom, 15 May 1943; Lt Col Troy W Crawford, 27 Jul 1943; Col Frank P Bostrom, 11 Nov 1943; Lt Col Troy W Crawford, 27 Nov 1943-1 Apr 1944. 1st Lt James J Shaffner, 29 Apr 1944; Maj John G Reiber, 3 May 1944; Col Estley R Farley, 26 May 1944; Col Elbert D Reynolds, 23 Jun 1944; Col Douglas C Polhamus, 12 Aug 1944-unkn. Unkn, 1 May-16 Jun 1951.
Campaigns. American Theater; Air Offensive, Japan; Western Pacific.
Decorations. Distinguished Unit Citations: Japan, 3-9 Jul 1945; Tokyo, Japan, 8 Aug 1945.
Data from Air Force Combat Units of World War II By Maurer, Maurer, Published 1986