Mexican Cession & the Mexican American War (1848) military conquest
War in Texas Mexico = Texas annexation, act of war No border ever agreed upon (Dispute over Rio Grande) While patrolling the Rio Grande, American Soldiers killed Declare war on Mexico
New Mexico and California Polk determined to have California and New Mexico Areas first colonized by Spain, then became Mexican territories Both areas fell during Mexican war Invades Mexico
Treaty of Guadalupe Hidalgo Mexico gives up Texas and Mexican Cession (Half of ALL its territory) U.S. pays Mexico and promises to protect Mexicans in Texas A few years later, Gadsden Purchase (1853) – bought from Mexico to complete sw border for transcontinental RR