Complex sentence: Activated in World War II to prevent German landings along northeast coast of Greenland, the patrol iscovered German weather station at Sabine Island, which was subsequently destroyed by USAF bombers from Iceland.
Split into simpler sentences: Activated in World War 2 to prevent German landings along northeast coast of Greenland. Discovered German weather station at Sabine Island, which was subsequently destroyed by USAF bombers from Iceland.