Complex sentence: The group hit enemy positions to cover the airborne attack on the Netherlands in September 1944 and subsequently struck front-line positions, communications, and airfields to help stop the German counteroffensive in the Battle of the Bulge, Dec 1944-Jan 1945.
Split into simpler sentences: The group hit enemy positions to cover the airborne attack on the Netherlands in September 1944. Struck front-line positions, communications, and airfields to help stop the German counteroffensive in the Battle of the Bulge, Dec 1944-Jan 1945.