The Desert Rangers are a faction of warriors that have lasted since the Great War, descended directly from the Texas and Army Rangers. The largest benevolent faction in the Four Corners, the Desert Rangers act as peacekeepers for the region. They have managed to keep a consistent roster of active, skilled fighters since the Great War by way of passing down knowledge, both on combat training and survival, and through keeping a steady supply of weapons.
The Ranger's mission of peace in the Four Corners is generally opposed by everyone else, and in 2248 they came into conflict with Caesar's Legion and the two have been at war since. The Rangers are slowly losing the war, and have made an alliance with the NCR in hopes the Republic will supply them with enough equipment to turn the tide.