Complex sentence: American RAF pilot Billy Fiske died at Tangmere and was the first American aviator to die during World War II. Famous World War II aces Douglas Bader, the wing commander, and then inexperienced Johnnie Johnson were at Tangmere in 1941.
Split into simpler sentences: American RAF pilot Billy Fiske died at Tangmere and was the first American aviator to die during the Second World War. Famous Second World War aces Douglas Bader, the wing commander, and then inexperienced Johnnie Johnson were at Tangmere in 1941.