The document summarizes the United States' war with Mexico from 1845 to 1848, which resulted in the United States acquiring large swaths of territory in the modern-day American Southwest. Key events included the annexation of Texas in 1845, a border dispute along the Rio Grande that helped trigger open conflict in 1846, and General Winfield Scott's capture of Mexico City in 1847 that led to the Treaty of Guadalupe Hidalgo, in which Mexico ceded California, New Mexico, and other territories for $15 million. The new territorial acquisitions intensified debates over the expansion of slavery that contributed to the coming of the Civil War.

1. The War with Mexico Manifest Destiny at Work

2. Texas Texas is annexed - 1845 Balance of Power? Polk promises to annex OR Preserve the Balance of Power

3. Pres. Polk

4. Oregon Country “ 54 - 40 or Fight” Some wanted it all Pres. Polk? Doesn’t want war Willing to compromise 49th parallel

6. Oregon Treaty

7. War with Mexico Why did fighting start? Border Dispute - Texas Mexico - Nueces R. US - Rio Grande R. No more Americans in California – closed the border

8. War with Mexico

9. Perception

10. War Gen. Zachary Taylor moves to Rio Grande “ Invades” Mexico Mexicans cross river “ Invades” US Dec. of War - 5-13-1846

12. Gen. Scott Knockout Blow Landed at Vera Cruz Captured Mexico City September 14, 1847 War officially ends 5 months later

13. California Americans in California decided to revolt Best chance for Independence Led by John C. Fremont Declared Independence Bear Flag Republic

15. Peace Treaty Guadalupe Hidalgo Boundary - Rio Grande Mexico gave up CA, NM, AZ, UT, NV, CO, and TX 2/5 of land (40%) US paid $15,000,000

17. Land Transfer

18. Conclusion How does the acquisition of all this new land affect the coming of the Civil War?