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.
Delta Force is often referred to as Special Forces Operational Detachment-Delta. It's also known as the Combat Applications Group (CAG). While it often draws its ranks from the Army Special Forces (the Army Green Berets) and shares Fort Bragg, N.C. , headquarters with them, it isn't an Army Special Forces detachment. Delta Force operator prepares for a HALO (High Altitude Low Opening) Exercise. Photo Greg Matheison/Mai/ Time LifePictures/ Getty Images. Consider a special operations force that's trained to the highest level in the United States military.