USA HISTORY

Detailed explanation-1: -In 1845 the United States annexed Texas and subsequently engaged in a dispute with Mexico over the southern Texas-Mexico border. Texas claimed that its southwest boundary extended to the Rio Grande. Mexico claimed that the boundary was the Nueces River, which is 100 miles (160 kilometers) eastward.

Detailed explanation-2: -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-3: -On June 23, 1845, a joint resolution of the Congress of Texas voted in favor of annexation by the United States. The leaders of the republic first voted for annexation in 1836, soon after gaining independence from Mexico, but the U.S. Congress was unwilling to admit another state that permitted slavery.

Detailed explanation-4: -The U.S. annexation of Texas and a dispute over the area between the Rio Grande and the Nueces River brought about the Mexican-American War.

Detailed explanation-5: -While Mexico did not follow through with its threat to declare war if the United States annexed Texas, relations between the two nations remained tense due to Mexico’s disputed border with Texas.