The background of this war goes back to the 1830’s with regards to Texas’ independence. Texas had successfully gained independence in 1836 after a political dictator of Mexico decided he would crush any signs of rebellion in Texas. Thus the Republic of Texas was formed, and it was not part of the U.S.
On this day March 10th, in 1848, the U.S. Senate signs the Treaty of Guadalupe Hidalgo and end the Mexican-American War. According to the treaty, the new Mexico border would be the Rio Grande.Mexico had never relinquished its perceived control over Texas, and warned that if the U.S. were to annex Texas, it would lead to war.
On November 10, 1845, a U.S. representative was sent to Mexico to negotiate the sale of Texas and other land in the west. In addition to the money that the U.S. was willing to offer, part of the deal was that Mexico would no longer have to pay for damages incurred during the Mexican War of Independence. Not only was Mexico’s government in shambles with a completely unstable government, but the public had no desire to surrender any of its land on the basis of honor. On December 29, 1845 Texas became the 28th state in of the U.S., and within months the war had been launched.