Complex sentence: In September 1944, the squadron contributed to the Allied victory in the Arnhem-Nijmegen airborne landings; notably, they suppressed numerous ground positions during the airborne assault and were credited with saving scores of American and British troop transports.
Split into simpler sentences: In September 1944, the squadron contributed its part to the Arnhem-Nijmegen airborne landings. Attacking and silencing numerous ground positions during the airborne assault, the unit was credited with saving scores of American and British troop transports.