Complex sentence: Mayberry served with Marine fighter squadron VMF-123, flying F4U Corsair fighter aircraft, and was credited with shooting down three Japanese planes in battle over Vella Lavella Island; some sources also say it was four, with a fifth as probable.
Split into simpler sentences: Mayberry served with Marine fighter squadron VMF-123, flying F4U Corsair fighter aircraft, and was credited with shooting down three Japanese planes in battle over Vella Lavella Island. Some sources also say it was four, with a fifth as probable.