Annextion of Texas
For Better or For Worse
Manifest Destiny was the belief that it was a God-given right of the United States to expand all of the way across North America. Annexing Texas brought the Americans one step closer to California and that dream, but many Midwesterners and Northerners also considered Manifest Destiny to be a convenient excuse for spreading slavery and opposed it.
A major issue with annexing Texas was slavery. Those in the north were worried that Texas would be a slave state and throw the states out of balance, giving the slave states an upper hand. Also, free black Texans felt threatened by the idea of them possibly losing their freedom. If not their freedom, at least their rights as business owners.
War with Mexico
The vast majority of annexation-opposing Americans did just that because they knew that Texas was having border disputes with Mexico and didn't want to have a war with them. While they were Mexican by blood, the Tejanos had no lingering loyalties with them. The Mexicans refused to recognize the Treaties of Velasco and that cut any Tejano ties that still remained.
Before America could stretch from sea to shining sea, California must have been claimed. The annexation of Texas was followed by the extinguishing of British claims on Oregon Country and later Cession of Mexico, at last achieving the American dream of Manifest Destiny.
The Civil War
The United States was divided, and Texas, which was a slave state, made enemies in the Union quickly. The North finally won out and the United States of America became a free, and unified, country.
The Disputed Territory
While Texas, and eventually the U.S., believed the border with Mexico to be the Rio Grande (as in accordance with the Treaty of Velasco), Mexico considered the border to be the Nueches River, ending in the Mexican-American War.