Texas

In the early 21st century, when the United States was divided into thirteen commonwealths, one of them was the Commonwealth of Texas, consisting of the states of Texas and Arkansas, so any mentions of Texas might refer to either the state or the commonwealth. In 2052, a television documentary into the withered husk of the Texas oil fields brought the oil shortage into the American households, and reveals how deep the energy crisis runs.

Not much is known about the former state of Texas after the Great War, Cassidy often wondered whether Texas survived the War at all. However, Tycho is known to have gone as far as the Gulf of Mexico in Texas and then headed back west. After his quest with the Chosen One was over, Cassidy went on to search for Texas, breaking south through NCR and past Dayglow.

After the Caesar's Legion's defeat when it tried to take Hoover Dam, Caesar has moved east of Texas, past the legendary cyclones that rage for most of the months of the year (Anton, the leader of the non-NCR salvagers in Denver, is from the Midwest, home of the radioactive cyclones, and fled to this area to escape Caesar's Legion).

Some Brotherhood paladins were sent there to investigate some strange rumors of mutant beings surfacing near the area formerly known as North Texas. It turned out that Attis was gathering his mutant army there to search for the FEV stored in Vault-Tec's Secret Vault under the ghoul city of Los. After the paladins were missing, some initiates were sent to the town of Carbon to find them.

Appearances in games
Only Fallout: Brotherhood of Steel takes place in Texas, although other games mention it in passing.