Complex sentence: British RAF pilot training at the airfield ended in early September 1945, with the end of World War II. The airfield was determined to be excess by the military and turned over to the local government for civil use.
Split into simpler sentences: British RAF pilot training at the airfield ended in early September 1945. With the end of World War II the airfield was determined to be excess by the military and turned over to the local government for civil use.