This book examines the wide variety of airborne units that served in the PTO, including the legendary 1st Special Service Force.The nature of the enemy and the terrain in the PTO, and long distances that had to be covered, provided significant and diverse challenges to both Army and Marine Corps parachute units. Among the units discussed herein are the 12,000-strong 11th Airborne Division; the elite 1st Special Service Force; the 503rd Parachute Infantry Regiment (Separate); and the 1st Marine Parachute Regiment.Internal organization, weapons and equipment, command and control, training, combat missions, and combat operations including the 11th Division's fighting in the Philippines, and the 503rd PIR's legendary jump onto Corregidor and recapture of the island are all covered in this comprehensive volume.