Ranger Unification Treaty
Under the treaty, the Desert Rangers were absorbed into the New California Republic Rangers. In return, the New California Republic took on the burden of protecting Hoover Dam, New Vegas, and southern portions of Nevada against the forces of the Caesar's Legion.
The Desert Rangers brought their traditional garb, military combat armor worn underneath desert dusters, along with them. The combination proved to be popular and by 2281, veteran Rangers of the Republic all wear a similar combination of clothing to distinguish themselves from the NCR Army and other Rangers.
Additionally, a monument was erected at the Mojave Outpost to commemorate the signing of the treaty.
The Ranger Unification Treaty is mentioned in Fallout: New Vegas.
- Mojave outpost monument plaque: "In the year 2271, the Desert Rangers of Nevada and rangers of the New California Republic met at this spot to sign the Ranger Unification Treaty. Under this treaty, the Desert Rangers agreed to be absorbed into the NCR in exchange for NCR's protection of Hoover Dam, New Vegas, and southern Nevada against the forces of Caesar's Legion."
- Hanlon's dialogue: "There's a lot of answers to that question, but it started with the Ranger Unification Treaty. We weren't always the only show in town. Nevada had its own posse, the Desert Rangers. They fought Caesar even farther east, out in Arizona. Didn't go well for them. Years back, we met with the Desert Rangers at Mojave Outpost and agreed to help them against Caesar if they would join the NCR."