USA HISTORY

Detailed explanation-1: -Overview. Texas was annexed by the United States in 1845 and became the 28th state. 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.

Detailed explanation-2: -In the 1848 Treaty of Guadalupe Hidalgo, the United States gained California, Arizona, New Mexico, and the Rio Grande boundary for Texas, as well as portions of Utah, Nevada, and Colorado. Because of Texas annexation, America ended up gaining a huge expansion of territory. The United States was now a true world power.

Detailed explanation-3: -In 1843, U.S. President John Tyler, then unaligned with any political party, decided independently to pursue the annexation of Texas in a bid to gain a base of support for another four years in office.

Detailed explanation-4: -In 1844, Congress finally agreed to annex Texas. On December 29, 1845, Texas entered the United States as a slave state, broadening the irrepressible differences in the United States over the issue of slavery and setting off the Mexican-American War.

Detailed explanation-5: -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.