Fort Bliss is a United States Army post in New Mexico and Texas, with its headquarters in El Paso, Texas. Named in honor of LTC William Bliss (1815–1853), a mathematics professor who was the son-in-law of President Zachary Taylor, Ft. Bliss has an area of about 1,700 square miles (4,400 km2); it is the largest installation in FORSCOM and second-largest in the Army overall. The portion of the post located in El Paso County, Texas, is a census-designated place with a population of 8,591 as of the time of the 2010 census. Fort Bliss provides the largest contiguous tract of restricted airspace in the Continental United States, used for missile and artillery training and testing, and at 992,000 acres boasts the largest maneuver area. The garrison's land area is accounted at 1.12 million acres, ranging to the boundaries of the Lincoln National Forest and White Sands Missile Range in New Mexico. Fort Bliss also includes the Castner Range National Monument.

El Paso is a city in and the county seat of El Paso County, Texas, United States. The 2020 population of the city from the U.S. Census Bureau was 678,815, making it the 22nd-most populous city in the U.S., the most populous city in West Texas, and the sixth-most populous city in Texas. Its metropolitan statistical area covers all of El Paso and Hudspeth counties in Texas, and had a population of 868,859 in 2020.