Coahuila y Tejas (Coahuila and Texas) was one of the constituent states of the newly established United Mexican States under its 1824 Constitution.

It had two capitals: first Saltillo, and then Monclova. For administrative purposes, the state was divided into three districts: Béxar, comprising the area covered by Texas, Monclova, comprising northern Coahuila, and Río Grande Saltillo, comprising southern Coahuila.

The state remained in existence until the adoption of the 1835 "Constitutional Bases", whereby the federal republic was converted into a unitary one, and the nation's states, (estados), were turned into departments (departamentos). The State of Coahuila y Texas was split in two and became the Department of Coahuila and the Department of Texas. The latter eventually seceded and became the independent Republic of Texas, which is now the state of Texas within the United States of America.

Both Coahuila and Texas seceded from Mexico because of Santa Anna's attempts to centralize the government, with Texas forming the Republic of Texas and Coahuila joining with Nuevo León, and Tamaulipas to form the short-lived Republic of the Rio Grande.

Coahuila, formally Coahuila de Zaragoza (Spanish pronunciation: [koaˈwila ðe saɾaˈɣosa]), officially Free and Sovereign State of Coahuila de Zaragoza (Spanish: Estado Libre y Soberano de Coahuila de Zaragoza), is one of the 31 states which, along with the Federal District, compose the 32 Federal Entities of Mexico. The state is located in Northeastern Mexico.

Coahuila borders the Mexican states of Nuevo León to the east, Zacatecas and San Luis Potosí to the south, and Durango and Chihuahua to the west. To the north, Coahuila accounts for a 512 kilometres (318 mi) stretch of the U.S. - Mexico border, adjacent to the United States state of Texas along the course of the Rio Grande (Río Bravo del Norte). With an area of 151,563 square kilometres (58,519 sq mi), it is the nation's third-largest state. It comprises 38 municipalities (municipios). In 2010, Coahuila's population is 2,748,391 inhabitants.

The capital of Coahuila is Saltillo, and its largest city is Torreón. Coahuila also includes the cities of Monclova (a former state capital), Piedras Negras, and Ciudad Acuña.

Samuel "Sam" Houston (March 2, 1793–July 26, 1863), was a nineteenth-century American statesman, politician, and soldier. He was born in Timber Ridge in the Shenandoah Valley of Virginia, of Scots-Irish descent. Houston became a key figure in the history of Texas and was elected as the first and third President of the Republic of Texas, U.S. Senator for Texas after it joined the United States, and finally as a governor of the state. He refused to swear loyalty to the Confederacy when Texas seceded from the Union in 1861 with the outbreak of the American Civil War, and was removed from office. To avoid bloodshed, he refused an offer of a Union army to put down the Confederate rebellion. Instead, he retired to Huntsville, Texas, where he died before the end of the Civil War.

His earlier life included migration to Tennessee from Virginia, time spent with the Cherokee Nation (into which he later was adopted as a citizen and took a wife), military service in the War of 1812, and successful participation in Tennessee politics. Houston is the only person in U.S. history to have been the governor of two different states (although other men had served as governors of more than one American territory).