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The 378th Bombardment Group was a short-lived anti-submarine warfare unit that served in the US during 1942.
The group was activated on 18 October 1942 and inactivated two months later, on 14 December. It was given three squadrons, and for those two months carried out anti-submarine patrols off the US east coast.
The group was inactivated because of a change in the structure of the anti-submarine forces. A number of normal sized groups were disbanded and their squadrons formed into larger anti-submarine wings, in this case the 26th Antisubmarine Wing.
To follow
Douglas O-46 (main): 1942
North American O-47 (main): 1942
Douglas B-18 Bolo
Consolidated B-24 Liberator
North American B-25 Mitchell
Lockheed B-34 Ventura
| 13 October 1942 | Constituted as 378th Bombardment Group (Heavy) |
| 18 October 1942 | Activated and assigned to Antisubmarine Command |
| 14 December 1942 | Inactivated |
Col Walter M Williams: 1942
Langlay Field, Va: 18 October-14 December 1942
15th Antisubmarine Squadron: 1942
17th Antisubmarine Squadron: 1942
521st Antisubmarine Squadron: 1942
15th was previously 520th Bombardment Squadron
17th was previously 522nd Bombardment Squadron and became 855th Bombardment Squadron
1942: Antisubmarine Command (later I Bomber Command)