The 733d Bombardment Squadron was activated at Wendover Field, Utah as one of the four squadrons of the 453d Bombardment Group. It moved to Pocatello Army Air Field, Idaho, where it was brought up to strength and trained with Consolidated B-24 Liberators, completing its training at March Field, California in December and departing for the European Theater of Operations, with the ground echelon departing on 2 December.
The ground echelon arrived at the squadron's combat station, RAF Old Buckenham on 23 December 1943, where the squadron was fully established with the arrival of the air echelon by January 1944. The 733rd flew its first mission against an airfield at Tours on 4 February 1944. The squadron participated primarily in the strategic bombing campaign against Germany. Toward the end of February, the squadron participated in Big Week, Eighth Air Force's concentrated attack on the German aircraft manufacturing industry. Other targets in Germany included a rail viaduct at Altenbeken, a fuel storage facility at Dulmen, oil refineries at Gelsenkirchen, an ordnance depot at Glinde, an aircraft assembly plant at Gotha, a rail center at Hamm, a chemical factory at Leverkusen, a commercial canal at Minden, an airfield at Neumunster and marshalling yards at Paderborn. In addition to its strategic missions, the squadron also engaged in air support and interdiction missions. It bombed V-1 flying bomb and V-2 rocket launch sites, airfields and coastal defense guns to prepare for Operation Overlord, the invasion of Normandy. On D-Day, it struck coastal fortifications between Le Havre and Cherbourg and enemy positions inland from the landing area. It made attacks on enemy troops to support Operation Cobra, the breakout at Saint Lo in July 1944. It bombed German lines of communication during the Battle of the Bulge in December 1944 and January 1945. On two occasions, the squadron carried out airlift missions. In September 1944, it flew rations, gasoline and blankets to advancing troops in France. During Operation Varsity, the airborne assault across the Rhine near Wesel, it dropped medical supplies, food and ammunition to troops at the bridgehead. The squadron flew its last mission on 12 April 1945, and was withdrawn from combat to prepare for possible redeployment to the Pacific. The squadron's personnel departed Old Buckenham for the Port of Embarkation on 9 May 1945, apparently leaving their aircraft behind. The squadron assembled at New Castle Army Air Base, Delaware in late May, but soon moved to Fort Dix Army Air Base, New Jersey. Initial plans were to convert the unit to a very heavy bomber squadron, but the Japanese surrender changed those plans and the unit was inactivated on 12 September.
Lineage
Constituted as the 733d Bombardment Squadron on 14 May 1943
