The Expansion of the United States: Texas and California American History In 1819, the Transcontinental Treaty was drafted with Spain, which set boundaries for the United States that included the territory of Texas. However, in 1821, the treaty was ratified and just as Americans (led by Stephen F. Austin) had begun to settle, Mexico did away with any semblance of Spanish rule. For a while after this, Mexican authorities were giving free land to groups of American …showed first 75 words of 2261 total…

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