Southwest Commonwealth Conservation Area

The Southwest Commonwealth was one of the thirteen commonwealths of the pre-War United States. Created in the early 21st century, it was comprised of the former states of Southern California, Nevada and Hawaii.

New California
New California is a region defined by the New California Republic that comprises northern Nevada and all of California. It can be divided into two sections: the Southern California Wasteland and the Nevada Wasteland.

The Nevada Wasteland is described as an empty no man's land in 2161, at least when compared to the Southern California Wasteland.

Mojave Wasteland
The Mojave Wasteland is a wasteland that comprises southern Nevada and parts of California and Arizona. The Mojave Wasteland is having power struggles between the NCR invaders, Caesar's Legion tribals, and Mr. House. Hoover Dam and the New Vegas Strip are the main interests and concerns. Drug running, gang life, and rampaging tribals are not rare in the area, as well as runaway creatures and hostile wildlife.

New California or Southern California Wasteland (Fallout, Fallout 2, Mentioned in Fallout: New Vegas)

 * Anaheim (Mentioned in Fallout 2)
 * Anza-Borrego (Mentioned in Fallout: New Vegas)
 * Barstow (Fallout Official Survival Guide)
 * Boneyard (Fallout)
 * Hollywood (Mentioned in Fallout: New Vegas)
 * Los Angeles Vault (Fallout)
 * Cathedral (Fallout)
 * Dayglow (Mentioned in Fallout, Fallout 2 and Fallout: New Vegas)
 * The Hub (Fallout)
 * Irvine (Mentioned in Fallout: New Vegas)
 * Junktown (Fallout)
 * Lake Isabella (Mentioned in Fallout: New Vegas)
 * Necropolis (Fallout)
 * Vault 12 (Fallout)
 * Oak Creek (Mentioned in Fallout: New Vegas)
 * One Pine (Mentioned in Fallout: New Vegas)
 * Owens Lake (Mentioned in Fallout: New Vegas)
 * Owens River (Mentioned in Fallout: New Vegas)
 * Scrapheap (Fallout Demo)
 * San Onofre (Mentioned in Fallout: New Vegas)
 * Shady Sands (Fallout, Fallout 2)
 * Vault 13 (Fallout, Fallout 2)
 * West Tek Research Facility (Fallout)

Nevada Wasteland (Fallout, Fallout 2, Mentioned in Fallout: New Vegas)

 * Area 51 (Mentioned in Fallout)
 * Broken Hills (Fallout 2)
 * Caliente (Mentioned in Honest Hearts)
 * Gecko (Fallout 2)
 * Hawthorne Army Depot (Mentioned in Fallout: New Vegas)
 * New Reno (Fallout 2)
 * Vault 15 (Fallout, Fallout 2)
 * Vault City/Vault 8 (Fallout 2)
 * Yucca Mountain (Mentioned in Fallout: New Vegas)

Mojave Wasteland (Fallout: New Vegas)

 * Area 2 (Fallout: New Vegas)
 * Boulder City (Fallout: New Vegas)
 * Camp Searchlight (Fallout: New Vegas)
 * Cottonwood Cove (Fallout: New Vegas)
 * Freeside (Fallout: New Vegas)
 * Goodsprings (Fallout: New Vegas)
 * Henderson (Fallout: New Vegas)
 * Hoover Dam (Fallout: New Vegas, Van Buren)
 * Jacobstown (Fallout: New Vegas)
 * Nellis Air Force Base (Fallout: New Vegas)
 * New Vegas (Mentioned in Fallout, Fallout: New Vegas)
 * Vault 3 (Fallout: New Vegas)
 * Vault 21 (Fallout: New Vegas)
 * Nipton (Fallout: New Vegas)
 * Novac (Fallout: New Vegas)
 * Primm (Fallout: New Vegas)
 * Red Rock Canyon (Fallout: New Vegas)

Appearances
The Southwest Commonwealth appears in Fallout, Fallout 2, and Fallout: New Vegas, and is mentioned in all of its add-ons, as well as Fallout 3 and the Fallout Bible. It was also to appear in Van Buren and Jason Mical's Fallout Pen and Paper d20. The pre-War iteration of the Fabulous New Vegas sign appears in the Atomic Command game in Fallout 4.