President Anson Jones vice president (deceased July 1845 never replaced) Annexion of the United States was anything but automatic for Texas once Mexican independence was won in 1836. Sam Houston noted that Texas was “more Coy than forward” when negotiations reached their peak in 1845. On the vast Texas border, anarchy was widespread and Mexico`s civil laws remained largely inexhaustible among Anglo-American settlers. In particular, prohibitions against slavery and forced labour have been ignored. The requirement that all settlers be Catholic or converted to Catholicism was also infiltrated.   The Mexican authorities, who lost control of Texas and were alerted by Fredonian`s unsuccessful rebellion of 1826, abandoned the politics of benevolent domination. In 1829-1830, new restrictions were introduced, which opposed slavery throughout the country and ended the continuation of American immigration to Texas.   The military occupation ensued, provoking local uprisings and civil war. The Texas conventions of 1832 and 1833 filed petitions to repair complaints to overturn restrictions, with limited success. In 1835, an army under Mexican President Santa Anna invaded its Texas territory and abolished autonomy.
On March 2, 1836, the Texans proclaimed their independence from Mexico. April 20-21 the rebels under Texan General Sam Houston defeated the Mexican army in the Battle of San Jacinto.   In June 1836, while in Texans custody, Santa Anna signed an agreement on Texas independence, but the Mexican government refused to ratify the agreement reached under duress.  The Texans, now de facto independent, understood that their security and prosperity could never be achieved, while Mexico denied the legitimacy of their revolution.  John C. Calhoun of South Carolina, a pro-slavery extremist, advised The Secretary Upshur that British plans for American slavery were real and required immediate action to avoid the Acquisition of Texas by the United Kingdom. In September, when Tyler confirmed that the British Foreign Secretary, Aberdeen, had encouraged détente between Mexico and Texas and allegedly pushed Mexico to maneuver Texas to emancipate his slaves, Tyler acted immediately.   On September 18, 1843, in agreement with Secretary Upshur, he ordered secret talks with Texas Minister Isaac Van Zandt to negotiate the annexation of Texas.  Personal negotiations began on October 16, 1843.  After the success of Texas` war of independence against Mexico in 1836, President Martin van Buren renounced the annexation of Texas after the Mexicans threatened to wage war. Although the United States recognized diplomatic recognition in Texas, it did not take further annexation measures until 1844, when President John Tyler resumed negotiations with the Republic of Texas.