USA HISTORY

Detailed explanation-1: -On May 12, 1846, the United States Senate voted 40 to 2 to go to war with Mexico. President James K. Polk had accused Mexican troops of having attacked Americans on U.S. soil, north of the Rio Grande. But Mexico claimed this land as its own territory and accused the American military of having invaded.

Detailed explanation-2: -Polk-signed the Treaty of Guadalupe Hidalgo with the Mexican government. The treaty ended the Mexican War, which began in 1846. Under the terms of the treaty, Mexico agreed to recognize the Rio Grande as the Texas border and ceded California and New Mexico to the United States.

Detailed explanation-3: -James Knox Polk (November 2, 1795 – June 15, 1849) was the 11th president of the United States, serving from 1845 to 1849.

Detailed explanation-4: -Troops were officially dispatched to help defend Texas from a potential Mexican attack on Texas. But they also represented a display of power as a U.S. negotiator headed to Mexico.