Complex sentence: Twenty-eight of the crewmen remained in the China Burma India theater, including the entire crews of planes 4,10, and 13, flying missions, most for more than a year; five were killed in action.
Split into simpler sentences: Twenty-eight of the crewmen remained in the China Burma India theater including the entire crews of planes 4,10, and 13. Flying missions, most for more than a year, five were killed in action.