USA HISTORY

Detailed explanation-1: -Finally, in 1848, Mexico ceded New Mexico and California in return for $15, 000, 000 and American assumption of the damage claims. President Polk added a vast area to the United States, but its acquisition precipitated a bitter quarrel between the North and the South over expansion of slavery.

Detailed explanation-2: -Polk is chiefly known for extending the territory of the United States through the Mexican–American War; during his presidency, the United States expanded significantly with the annexation of the Republic of Texas, the Oregon Territory, and the Mexican Cession following American victory in the Mexican–American War.

Detailed explanation-3: -Texas is admitted as a slave state, making it the twenty-eighth state in the Union. The Mormon migration to Utah, led by Brigham Young, begins. Congress declares war on Mexico after American troops, under General Zachary Taylor, clash with Mexican troops on the north bank of the Rio Grande.

Detailed explanation-4: -Pres. James K. Polk oversaw a large territorial expansion of the United States. He advocated for annexation of Texas and aggressively prosecuted the resulting Mexican-American War, which added much of the Southwest and California to the country’s territory.