Complex sentence: A mix of contemporary NHL superstars came to the rink, then in service with the Canadian Air force, these included players such as Bobby Bauer, Woody Dumart and Milt Schmidt.
Split into simpler sentences: A mix of contemporary NHL superstars who were, at the time, in service with the Canadian Air Force, came to the rink. These included players such as Bobby Bauer, Woody Dumart, and Milt Schmidt.