USA HISTORY

Detailed explanation-1: -In the end, Texas was admitted to the United States a slave state. The annexation of Texas contributed to the coming of the Mexican-American War (1846-1848). The conflict started, in part, over a disagreement about which river was Mexico’s true northern border: the Nueces or the Rio Grande.

Detailed explanation-2: -Prior to the annexation, many Americans opposed taking Texas into the Union because it was a slave holding state and it would contribute to the growing hostility between slave states and free states. Americans also feared that the annexation of Texas could lead to war with Mexico.

Detailed explanation-3: -Following the annexation, relations between the United States and Mexico deteriorated because of an unresolved dispute over the border between Texas and Mexico, and the Mexican–American War broke out only a few months later.

Detailed explanation-4: -Most American settlers were from southern states, and many had brought slaves with them. Mexico tried to accommodate them by maintaining the fiction that the slaves were indentured servants. But American slaveholders in Texas distrusted the Mexican government and wanted Texas to be a new U.S. slave state.