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.
Joining the Army Rangers Military.com All Rangers volunteer to become members of the 75th Ranger Regiment and complete the rigorous Ranger Assessment and Selection Program, known as RASP, to join the ranks of this elite U.S. Army Special Operations Command unit.