The Annexation of Texas by the United States

On June 23, 1845, a joint resolution of the Congress of Texas voted in favor of annexation by the United States. The leaders of the republic first voted for annexation in 1836, soon after gaining independence from Mexico, but the U.S. Congress was unwilling to admit another state that permitted slavery. Sam Houston (shown above), commander of the Texas army during the fight for independence from Mexico and the first president of the Republic of Texas, was a strong advocate of annexation.

In 1845, the political climate proved more favorable to the request for statehood. On December 29, 1845, Texas officially became the twenty-eighth state in the Union although the formal transfer of government did not take place until February 19, 1846. A unique provision in its agreement with the United States permitted Texas to retain title to its public lands. Further, Texas was annexed as a slave state.