Task Force 121 was a United States Department of Defense special operations task force. TF121 was a multi-service force commanded by U.S. Air Force Brigadier General Gregory L. Trebon. The spearhead of the force is a forty-man team made up of operators from the U.S. Army's 75th Ranger Regiment, U.S. Army's Delta Force, U.S. Army's Intelligence Support Activity, the U.S. Navy's DEVGRU, the CIA's Special Activities Division, DIA personnel, and the U.S. Army 160th Special Operations Aviation Regiment Other Special Operations contributions included U.S. Air Force Combat Controllers, and U.S. Air Force Pararescue. On occasions, operators from Coalition nations (particularly Canadian, British, Australian and Polish operators) augment the TF121 and provide direct and indirect operational assistan