Chihuahua is a state in northern Mexico with a mainland area of 247,087 square kilometers (95,400.8 sq mi). It is surrounded by the states of Sonora to the west, Sinaloa to the south-west, Durango to the south, and Coahuila to the east, and by the U.S. states of Texas to the north-east and New Mexico to the north. Chihuahua is the largest state in Mexico by area, and therefore has the nickname El Estado Grande ("The Big State").
Chihuahua played a pivotal role in the Mexican Revolution and was a battleground between revolutionary forces led by Pancho Villa and federal forces.
Chihuahua contributed troops to both the Great War and the Second Great War, although U.S. forces left the state relatively alone. Chihuahua, like Sonora, became a Freedom Party stronghold after the Great War.
Although Sonora and Chihuahua had both been Mexican states, and maintained a strongly Mexican culture, there was a level of rivalry between the two.