USA HISTORY

Detailed explanation-1: -Until 1836, Texas had been part of Mexico, but in that year a group of settlers from the United States who lived in Mexican Texas declared independence. They called their new country the Republic of Texas, which was an independent country for nine years.

Detailed explanation-2: -Mexican Texas is the historiographical name used to refer to the era of Texan history between 1821 and 1836, when it was part of Mexico. Mexico gained independence in 1821 after winning its war against Spain, which began in 1810.

Detailed explanation-3: -Texas formally joined the union on February 19, 1846. Following the annexation, relations between the United States and Mexico deteriorated because of an unresolved dispute over the border between Texas and Mexico, and the Mexican–American War broke out only a few months later.

Detailed explanation-4: -In 1821, the Mexican War for Independence severed the control that Spain had exercised on its North American territories, and the new country of Mexico was formed from much of the lands that had comprised New Spain, including Spanish Texas.

Detailed explanation-5: -Texas used to be Mexico’s state of Coahuila y Texas. Coahuila remained in Mexico. May 14, 1836: The Treaties of Velasco ends the Texas Revolution with the creation of the Republic of Texas. 1837: Texas claims the Rio Grande as its border with Mexico.