USA HISTORY

Detailed explanation-1: -Mexico subsequently attacked a group of 80 soldiers on April 25, 1846, a move which Polk used to convince the Congress of the United States to declare war. Beyond the disputed area of Texas, U.S. forces quickly occupied the regional capital of Santa Fe de Nuevo México along the upper Rio Grande.

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: -To bring pressure, Polk sent Gen. Zachary Taylor to the disputed area on the Rio Grande. To Mexican troops this was aggression, and they attacked Taylor’s forces. Congress declared war and, despite much Northern opposition, supported the military operations.

Detailed explanation-4: -As war exists, and, notwithstanding all our efforts to avoid it, exists by the act of Mexico herself, we are called upon by every consideration of duty and patriotism to vindicate with decision the honor, the rights, and the interests of our country. . . .

Detailed explanation-5: -In late April 1846, Mexican troops crossed the Rio Grande and killed eleven U.S. soldiers. In response, Polk requested a declaration of war from Congress, arguing that Mexicans had “shed the blood of our fellow-citizens on our own soil.” By May 13, 1846, both nations officially were at war.