Complex sentence: On D-Day 1944 the group attacked coastal batteries at Cherbourg; during the remainder of June, the group supported the drive that resulted in the seizure of the Cotentin Peninsula, and bombed defended positions to assist British forces in the area of Caen.
Split into simpler sentences: On D-Day 1944 the group attacked coastal batteries at Cherbourg. During the remainder of June, the group supported the drive that resulted in the seizure of the Cotentin Peninsula, and bombed defended positions to assist British forces in the area of Caen.