Complex sentence: Established in June 1942 as a B-17 Flying Fortress heavy bombardment squadron, the squadron trained under the Second Air Force; it deployed to the European Theater of Operations (ETO) in September 1942, being assigned to VIII Bomber Command in England.
Split into simpler sentences: Established in June 1942 as a B-17 Flying Fortress heavy bombardment squadron; trained under Second Air Force. Deployed to the European Theater of Operations (ETO) in September 1942, being assigned to VIII Bomber Command in England.