Southwest Commonwealth Conservation Area

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

Known places

 * Core Region (Fallout, Fallout 2)
 * Mojave Desert (Fallout: New Vegas)

Appearances
The original Fallout, Fallout 2 and Fallout: New Vegas take place in the former Southwest Commonwealth. The canceled Van Buren would have featured places in this commonwealth as well.