Surgical removal of part or all of the colon. colectomy. surgical excision of part or all of the colon, performed to treat cancer of the colon, diverticulitis, or severe chronic ulcerative colitis. For several days before surgery a low-residue diet is prescribed.
Airborne Rangers are a direct-action force of raiders. The U.S. Army website describes a regiment of Airborne Rangers as a lethal, agile and flexible force.. They must maintain a state of combat readiness and, when deployed, are asked to complete complex, often dangerous missions.
The Ranger Regiment specializes in executing Direct Action (DA) missions. Moreover, they are the Armyâs elite force for raid missions and airfield seizure. The Regiment maintains a high level of alert â a battalion is able to mobilize and deploy as quickly as 18 hours after notification (N+18).