|Mexico snubs Slidell
||Pres. Polk instructs John Slidell to offer up to $25 million for New Mexico and California. Insulted
Mexicans refuse to see Slidell.
|Polk orders troops to southern Texas
||Rio Grande River
||Zachary Taylor and 4000 men are sent to disputed territory, expecting attack. Conflict with Mexican
troops results in 16 American casualties.
|Congress declares war on Mexico
||Polk asks for war with Mexico. Northern Whigs fear victory would add more slave states to U.S. Declaration
passes 40-2 in Senate, 174-14 in House. Whig Congressman Lincoln asks for the spot on American soil where American blood was
|Bear Flag Republic established
||John C. Fremont and volunteers capture town of Sonoma and hoist Bear Flag.
|Americans capture Monterey
||250 sailors capture Mexico's California capital without a shot.
|Kearny takes Santa Fe
||Marching from Kansas to California, Stephen Kearny's 1700 men take key Mexican trading post.
|Battle of San Pascual
||San Diego, California
||In fierce fighting, Kearny's forces barely survive attack of Mexican lancers.
|Battle of San Gabriel
||San Gabriel, California
||Californio forces retreat as American forces cross San Gabriel River and take Los Angeles
|Battle of Buena Vista
||With a much larger army (20,000 to Taylor's 5,000), Santa Anna is unable to defeat Taylor's American
||East coast of Mexico
||Winfield Scott and 14,000 men capture port and begin following Cortez's route to Mexico City
||U.S. captures city. Santa Anna loses 4,000 of his 25,000-man army, while Scott loses 900 of his 10,000.
|Treaty of Guadalupe Hidalgo
||February 2, 1848
||Mexico gives up all claim to Texas. U.S. pays Mexico $15 million and agrees to assume American citizens'
claims ($3,250,000) against Mexico. Expansionists call for "All Mexico." Senate passes treaty 38-14.|