XVIII Airborne Corps

The XVIII Airborne Corps, formed in the Second World War, was long the U.S. Army strategic reserve headquarters in the Cold War. With the drawdown of Army higher tactical headquarters, it has gone into general deployments when a senior command echelon is needed, as in the Eastern Regional Command of the International Security Assistance Force in the Afghanistan War (2000-).

Its main elements are among the most mobile elements of the U.S. Army, backed up with a heavy division:
 * 82nd Airborne Division
 * 101st Airborne Division, which now is air assault rather than paratroop
 * 10th Mountain Division
 * 3rd Infantry Division, formerly designated the 24th Mechanized Division
 * 2nd Armored Cavalry Regiment