Complex sentence: The field served as a training site for glider tactics and paratroopers and was one of the eight bases in the United States dedicated to training glider pilots for combat missions performed by the Troop Carrier Command.
Split into simpler sentences: The field served as a training site for glider tactics and paratroopers. It was one of the eight bases in the United States dedicated to training glider pilots for combat missions performed by the Troop Carrier Command.