USA HISTORY

Detailed explanation-1: -Mexico claimed the Nueces River as its northeastern border, while the U.S. claimed the Rio Grande River, and the day that both troops met at the Rio Grande and the Mexican army opened fire, on April 25, 1846, the Mexican American War began.

Detailed explanation-2: -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-3: -The United States Army won a grand victory. Although suffering 13, 000 killed, the military won every engagement of the war. Mexico was stripped of half of its territory and was not consoled by the monetary settlement.

Detailed explanation-4: -Peña y Peña resumed the presidency January 8, 1848 – June 3, 1848, during which time the Treaty of Guadalupe Hidalgo was signed, bringing the war to an end.

Detailed explanation-5: -The Mexican-American War was a conflict between the United States and Mexico, fought from April 1846 to February 1848.