Coahuila y Tejas in the context of "Texas Revolution"

The Southwestern United States, also known as the American Southwest or simply the Southwest, is a geographic and cultural region of the United States that includes Arizona and New Mexico, along with adjacent portions of California, Colorado, Nevada, Oklahoma, Texas, and Utah. The largest cities by metropolitan area are Phoenix, Las Vegas, El Paso, Albuquerque, and Tucson. Before 1848, in the historical region of Santa Fe de Nuevo México as well as parts of Alta California and Coahuila y Tejas, settlement was almost non-existent outside of New Mexico's pueblos and Spanish or Mexican municipalities. Much of the area had been a part of New Spain and Mexico until the United States acquired the area through the Treaty of Guadalupe Hidalgo in 1848 and the smaller Gadsden Purchase in 1854.

While the region's boundaries are not officially defined, there have been attempts to do so. One such definition is from the Mojave Desert in California in the west (117° west longitude) to Carlsbad, New Mexico, in the east (104° west longitude); another says that it extends from the Mexico–United States border in the south to the southern areas of Colorado, Utah, and Nevada in the north (39° north latitude). In another definition, the core Southwestern U.S. includes only the states of Arizona and New Mexico; others focus on the land within the old Spanish and Mexican borders of the Nuevo México Province or the later American New Mexico Territory.

The Texian Militia was the militia forces of Texian colonists in the Mexican state of Coahuila y Tejas from 1823 to 1835 and the inaugurate force of the Texas Military. It was established by Stephen F. Austin on August 5, 1823 for defense of the Old Three Hundred colonists against the Karankawa, Comanche, and Cherokee tribes; among others. Its most notable unit, the Texas Rangers, remained in continuous service of Texas Military Forces until 1935.

The Texian Militia sparked the Texas Revolution at the Battle of Velasco and became legendary at the Battle of Gonzales (the "Lexington of Texas") which marked its transition to the Texian Army and Texian Navy. Their legend continued at the Battle of the Alamo as the only relief force to answer the To the People of Texas & All Americans in the World letter. The Texian Militia comprised 22% of the Texian Army service members who fought until the Battle of San Jacinto, helping the Texian Government win independence from the Centralist Republic of Mexico on May 14, 1836 at the Treaties of Velasco.

David Crockett (August 17, 1786 – March 6, 1836) was an American politician, militia officer and frontiersman. Often referred to in popular culture as the "King of the Wild Frontier", he represented Tennessee in the United States House of Representatives and fought in the Texas Revolution.

Crockett grew up in East Tennessee, where he gained a reputation for hunting and storytelling. He was made a colonel in the militia of Lawrence County, Tennessee, and was elected to the Tennessee state legislature in 1821. In 1827, he was elected to the U.S. Congress where he vehemently opposed many of the policies of President Andrew Jackson, especially the Indian Removal Act. Crockett's opposition to Jackson's policies led to his defeat in the 1831 elections. He was re-elected in 1833, then narrowly lost in 1835, prompting his angry departure to Texas (then the Mexican state of Tejas) shortly thereafter. In early 1836, he took part in the Texas Revolution and died at the Battle of the Alamo. It is unclear whether he died in battle or was executed after being captured by the Mexican Army.

The Battle of the Alamo (February 23 – March 6, 1836) was a pivotal event and military engagement in the Texas Revolution. Following a 13-day siege, Mexican troops under President General Antonio López de Santa Anna reclaimed the Alamo Mission near San Antonio de Béxar (modern-day San Antonio, Texas, United States). About one hundred Texians, wanting to defy Mexican law and maintain the institution of chattel slavery in their portion of Coahuila y Tejas by seeking secession from Mexico, were garrisoned at the mission at the time, with around a hundred subsequent reinforcements led by eventual Alamo co-commanders James Bowie and William B. Travis. On February 23, approximately 1,500 Mexicans marched into San Antonio de Béxar as the first step in a campaign to retake Texas. In the early morning hours of March 6, the Mexican Army advanced on the Alamo. After repelling two attacks, the Texians were unable to fend off a third attack. As Mexican soldiers scaled the walls, most of the Texian fighters withdrew into interior buildings. Those who were unable to reach these points were slain by the Mexican cavalry as they attempted to escape. Almost all of the Texian inhabitants were killed.

Several noncombatants were sent to Gonzales to spread word of the Texian defeat. The news sparked both a strong rush to join the Texian army and a panic, known as "The Runaway Scrape", in which the Texian army, most settlers, and the government of the new, self-proclaimed but officially unrecognized Republic of Texas fled eastward toward the U.S. ahead of the advancing Mexican Army. Santa Anna's execution of surrendering soldiers during the battle inspired many Texians and Tejanos to join the Texian Army. The Texians defeated the Mexican Army at the Battle of San Jacinto, on April 21, 1836, ending the conquering of the Mexican state of Coahuila y Tejas by the newly formed Republic of Texas.

Mexican Texas is the historiographical name used to refer to the era of Texan history between 1821 and 1834, when it was part of Mexico. Mexico gained independence in 1821 after winning its war against Spain, which began in 1810. Initially, Mexican Texas operated similarly to Spanish Texas. Ratification of the 1824 Constitution of Mexico created a federal structure, and the province of Tejas was joined with the province of Coahuila to form the state of Coahuila y Tejas.

In 1821, approximately 3,500 settlers lived in the whole of Tejas, concentrated mostly in San Antonio and La Bahia, although authorities had tried to encourage development along the frontier. The settler population was overwhelmingly outnumbered by indigenous people in the province. To increase the number of settlers, Mexico enacted the General Colonization Law in 1824, which enabled all heads of household, regardless of race, religion or immigrant status, to acquire land in Mexico.

Martín Perfecto de Cos (1800–1 October 1854) was a general for the Mexican army and a politician during the mid-19th century. Born in Veracruz, the son of an attorney, he became an army cadet at the age of 20, a Lieutenant in 1821, and a Brigadier General in 1833.

Cos is perhaps best known as a commander of Mexican forces during the Texas Revolution in the 1830s. In September 1835, he was sent by President-General Antonio López de Santa Anna to investigate the refusal of Texians to pay duties during the Anahuac Disturbances. General Cos dispersed the legislature of Coahuila y Tejas, then in session at Monclova, landed 300 men at Matagorda Bay, established a headquarters in San Antonio, and declared his intention of ending Texian resistance in Mexican rule. He attempted to arrest several Texian critics of Santa Anna, but his demands were resisted; a force of Texians under Stephen F. Austin and Edward Burleson held the Mexican troops for two months in the siege of Béxar until Cos surrendered after an attack led by Benjamin R. Milam in December 1835. Cos and his men were released on their pledge not to oppose further the Constitution of 1824, which Santa Anna had recently repealed.