Preceded by thousands of years of varying indigenous cultures, the Caddo people inhabited the Dallas area before Spanish colonists claimed the territory of Texas in the 18th century as a part of the Viceroyalty of New Spain. Later, France also claimed the area but never established much settlement.
In 1819, the Adams-Onís Treaty between the United States and Spain defined the Red River as the northern boundary ofNew Spain, officially placing the future location of Dallas well within Spanish territory.[18] The area remained under Spanish rule until 1821, when Mexico declared independence from Spain, and the area was considered part of the Mexican state of Coahuila y Tejas. In 1836, the Republic of Texas, with majority Anglo-American settlers, gained independence from Mexico to become a distinct nation.[19]
In 1839, Warren Angus Ferris surveyed the area around present-day Dallas. John Neely Bryan established a permanent settlement near the Trinity River named Dallas in 1841. The Republic of Texas was annexed by the United States in 1845 and Dallas County was established the following year. Dallas was formally incorporated as a city on February 2, 1856.