5 jan 1848 ano - Treaty of Guadalupe Hidalgo

Descrição:

- Est. US-MX border at Rio Grande River
- Gives US annexed land, including:
- New Mexico, Arizona, California, Texas
- Parts of Colorado, Utah, Nevada

WILMOT PROVISO
- Proposed legislation that stated that any land gained from Mexico should be free
- Was never passed because Southern states feared a free-state majority
- Reflected increasing abolitionist sentiment and increased SECTIONALISM
- Debate delays annexation