Columbia Commonwealth

The Columbia Commonwealth was one of the thirteen commonwealths of the pre-War United States. Created in 1969, it was comprised of the former states of Maryland and Virginia, as well as the District of Columbia.

Capital Wasteland
The Capital Wasteland spans much of the District of Columbia, as well as portions of both Maryland to the north and Virginia to the south. It is having power struggles between Brotherhood of the area, the Enclave survivors, and the super mutants. Vice and crime are rampant in the area, with raider clans, mercenary bands, and creatures pillaging any and all things that move. Several locations here include Washington, D.C., Little Lamplight, Minefield, Rivet City, Canterbury Commons, Arefu, and the Republic of Dave.

Maryland Wasteland
In the former state of Maryland, several locations can be explored or are mentioned, such as Adams Air Force Base, Baltimore, Camp David , Hagerstown , Damascus , Germantown, Olney, Paradise Falls, Rockville, Takoma Park, Wheaton, and the Western Maryland Correctional Facility.

The Maryland Wasteland is shown a small amount in the add-on Point Lookout. Swamplands and insane swampfolk abominations are excessive, and only a small group of tribals and wildlife reside there. Not much is known about the state, except that much of it wasn't hit by the bombs, and the damage done was the downfall of society, contact with the outside world, and the post-War radiation seeping into the state.

A small part of Maryland can be explored in Fallout 76. The entire area of The Mire that goes east of the Potomac River is a part of Maryland and the locations in it that can be explored are Braxson's Quality Medical Supplies, Crevasse Dam, Delano grange, Haven Church, Ransacked bunker, Sam Blackwell's bunker, Southern Belle Motel, Scoot's shack, Sunken church, Tanagra Town, and Thunder Mountain power plant.

Former Virginia
Parts of northern Virginia are explored in Fallout 3 as part of the Capital Wasteland, such as Andale and the ruins of Alexandria. Other known locations include W&M Law School, Megaton, Norfolk , Petersburg , Springfield , and the Blue Ridge Parkway.

A pair of wastelanders encountered in Fallout 76 hail from Virginia, and describe the state as "having more hotspots" compared to Appalachia, and is "mostly picked clean."

Appearances

 * The Columbia Commonwealth appears in Fallout 3 and its add-ons Broken Steel, Operation: Anchorage, and Point Lookout, and is mentioned in the add-ons The Pitt and Mothership Zeta.
 * Parts of the Columbia Commonwealth are mentioned in Fallout: New Vegas and its add-ons Dead Money and Lonesome Road.
 * Parts of the Columbia Commonwealth are mentioned in Fallout 4 and its add-on Automatron. The National Mall of Washington, D.C. also appears in the Atomic Command Pip-Boy game.
 * Parts of the Columbia Commonwealth appear in Fallout 76 and is mentioned in its update Wastelanders.