Complex sentence: The squadron has been formed on four occasions since it was first established in 1943, and saw combat during World War II as a fighter unit equipped with Supermarine Spitfires before being disbanded in 1945.
Split into simpler sentences: The squadron has been formed on four occasions since it was first established in 1943. It saw combat during World War II as a fighter unit equipped with Supermarine Spitfires, before being disbanded in 1945.