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 75th Ranger Regiment is a lethal, agile and flexible force, capable of conducting many complex, joint special operations missions. Today's Ranger regiment is the Army's premier direct-action raid force. Each of the four geographically dispersed Ranger battalions is always combat ready, mentally and physically tough, and prepared to fight our country's adversaries.