Southwest Commonwealth Conservation Area

The Southwest Commonwealth was one of the thirteen commonwealths of the pre-War United States. Created in 1969, it was comprised of the former states of Southern California, Nevada and Hawaii.

New California
New California is a region defined by the presence of the New California Republic, which is comprised of the entirety of California as well as areas of northern Nevada, southern Oregon, and Baja California, Mexico.

Former Southern California
Also known as the Core Region, and formerly known as southern California. The city of San Diego was damaged during the war, with its inhabitants eventually leading an exodus to the ruins of Los Angeles, also known as the Boneyard. Located in between is "the Glow," the ruins of a West Tek research facility. The Hub, Junktown and Shady Sands make up the northern part of the region.

Former Nevada
The former state of Nevada is described as an empty no man's land in 2161, at least when compared to the southern California Wasteland. Few are able to traverse the rough terrain of the Sierra Nevada Mountains alone. The region is sparsely populated. New Reno is the most significant town of northern Nevada, with smaller settlements such as Vault City, Gecko, and Broken Hills dotting the map.

Mojave Wasteland
The Mojave Wasteland is a region comprised of southern Nevada and parts of California and Arizona. A power struggle exists in the area between the NCR, Caesar's Legion, tribals, and Mr. House. Hoover Dam and the New Vegas Strip are the main locations and points of interest.

Known locations

 * New California, formerly Southern California (Fallout, Fallout 2, Fallout: New Vegas)
 * Anaheim (Fallout 2)
 * Anza-Borrego (Fallout: New Vegas)
 * Barstow (Fallout Official Survival Guide)
 * Boneyard (Fallout)
 * Cathedral (Fallout)
 * Hollywood (Fallout: New Vegas)
 * Los Angeles Vault (Fallout)
 * Vault-Tec headquarters (mentioned by Chris Taylor)
 * Dayglow (Fallout, Fallout 2 and Fallout: New Vegas)
 * Death Valley (Fallout Official Survival Guide and Honest Hearts)
 * The Divide (Lonesome Road)
 * The Hub (Fallout)
 * Irvine (Fallout: New Vegas)
 * Junktown (Fallout)
 * Lake Isabella (Fallout: New Vegas)
 * Monterey (mentioned in Fallout 4)
 * Necropolis (Fallout)
 * Vault 12 (Fallout)
 * Oak Creek (Fallout: New Vegas)
 * One Pine (Fallout: New Vegas)
 * Owens Lake (Fallout: New Vegas)
 * Owens River (Fallout: New Vegas)
 * Scrapheap (Fallout Demo)
 * San Onofre (Fallout: New Vegas)
 * Shady Sands (Fallout, Fallout 2)
 * Stockton (Fallout 2)
 * Vault 13 (Fallout, Fallout 2)
 * West Tek research facility (Fallout)


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


 * Former Hawaii (Far Harbor and Fallout 76)
 * Honolulu (Fallout Tactics)
 * Pearl Harbor (Fallout Tactics)

Appearances
The Southwest Commonwealth appears in Fallout, Fallout 2, Fallout: New Vegas (and is mentioned in all of its add-ons) and the Fallout Bible. Locations in California are mentioned in Fallout 3. The Mojave Desert is also mentioned in Fallout 4, and the pre-War iteration of the Fabulous New Vegas sign appears in the Atomic Command Pip-Boy game. Hawaii is also mentioned in the Fallout 4 add-on Far Harbor and Fallout 76. The Southwest Commonwealth was to appear in Van Buren and Jason Mical's Fallout Pen and Paper d20.