Mexican–American War (apr 25, 1846 – feb 3, 1848)
AKA: Mexican War
An armed conflict between the United States and Mexico from 1846 to 1848. It followed in the wake of the 1845 U.S. annexation of Texas, which was not formally recognized by the Mexican government, who disputed the Treaties of Velasco signed by Mexican caudillo President/General Antonio López de Santa Anna after the Texas Revolution a decade earlier. In 1845, newly elected U.S. President James K. Polk, who saw the annexation of Texas as the first step towards further expansion of the United States, sent troops to the disputed area and a diplomatic mission to Mexico. After Mexican forces attacked U.S. forces, the United States Congress declared war.
The 1848 Treaty of Guadalupe Hidalgo, forced onto the remnant Mexican government, ended the war and enforced the Mexican Cession of the northern territories of Alta California and Santa Fe de Nuevo México to the United States. The U.S. agreed to pay $15 million compensation for the physical damage of the war and assumed $3.25 million of debt already owed earlier by the Mexican government to U.S. citizens. Mexico acknowledged the loss of what became the State of Texas and accepted the Rio Grande as its northern border with the United States.
The victory and territorial expansion Polk envisioned inspired great patriotism in the United States, but the war and treaty drew some criticism in the U.S. for their casualties, monetary cost, and heavy-handedness, particularly early on. The question of how to treat the new acquisitions also intensified the debate over slavery.
Added to timeline:
History of Leadership In The States