The vast majority of Texans were in favor of annexation. The Texas Congress voted down a last-minute proposal of recognition by Mexico, brokered by England and France, if they would rebuff the offer of statehood. Too late. Sam Houston went from President of the Republic to Senator from Texas and the Lone Star State was welcomed into the Union.
The Annexation of Texas to the Union, by Donald M. Yena
(Texas State Library and Archives Commission, 1986/68-2)
Texas statehood triggered a controversial chain of events which led to Mr. Polk’s war with Mexico, a political war in Congress over the expansion of slavery into western territories, the birth of the Republican Party, the ascension of Abraham Lincoln to power as a purely sectional President, and the secession of South Carolina from the Union. After fifteen years of statehood, Texans decided the Union was not as conducive to protecting their future prosperity and social order as they had assumed, and on February 1st 1861, became the seventh state to join the Southern Confederacy, untying the bonds of Union for a new sort of independency. Thus, a sixth flag flew over those restless frontier individualists, for four years.