Mexican–American War and the Treaty of Guadalupe Hidalgo (1846–1848)

1. Thornton Affair sparks open hostilities

   Apr 25, 1846Labels: Thornton Affair, Seth Thornton, Rio Grande

   • Thornton Affair
   • Britannica Timeline

2. United States annexes Texas as a state

   Dec 29, 1845Labels: United States, Texas

   • NatGeo
   • History com

3. Battle of Palo Alto fought near Brownsville

   May 8, 1846Labels: Palo Alto, Zachary Taylor

   • Palo Alto

4. Thornton Affair sparks open fighting on Rio Grande

   Apr 25, 1846Labels: Thornton Affair, Seth Thornton

   • Thornton Affair
   • Britannica

5. Battle of Resaca de la Palma follows

   May 9, 1846Labels: Resaca de, Zachary Taylor

   • Resaca
   • Battlefields

6. Battles of Palo Alto and Resaca de la Palma

   May 8, 1846Labels: Palo Alto, Resaca de

   • NPS
   • Battlefield Trust

7. U.S. Congress declares war on Mexico

   May 13, 1846Labels: U S, James K

   • Britannica Timeline
   • History com

8. U.S. Congress approves declaration of war

   May 13, 1846Labels: U S, James K

   • U S Senate
   • Britannica
   • History com

9. Battle of Monterrey fought in Nuevo León

   Sep 21, 1846Labels: Monterrey, Zachary Taylor

   • Britannica
   • Monterrey

10. Bear Flag Revolt begins in northern California

    Jun 14, 1846Labels: Bear Flag, California

    • Britannica
    • History com

11. Battle of Buena Vista checks Santa Anna

    Feb 22, 1847Labels: Buena Vista, Antonio L

    • Buena Vista

12. Wilmot Proviso introduced, dividing U.S. politics

    Aug 8, 1846Labels: Wilmot Proviso, David Wilmot

    • Capitol Visitor
    • Wilmot Proviso

13. Siege of Veracruz begins amphibious invasion

    Mar 9, 1847Labels: Siege of, Winfield Scott

    • Veracruz

14. U.S. captures Monterrey after major urban battle

    Sep 24, 1846Labels: Monterrey, Zachary Taylor

    • Battle of Monterrey
    • Britannica

15. Battle of Cerro Gordo opens road inland

    Apr 18, 1847Labels: Cerro Gordo, Winfield Scott

    • Cerro Gordo

16. Treaty of Cahuenga ends major fighting in California

    Jan 13, 1847Labels: Treaty of, John C

    • Treaty Cahuenga

17. Battle of Contreras opens final campaign

    Aug 19, 1847Labels: Contreras, Winfield Scott

    • Britannica
    • Contreras

18. Battle of Buena Vista checks Santa Anna in the north

    Feb 22, 1847Labels: Buena Vista, Santa Anna

    • Britannica
    • UT Arlington

19. Battle of Churubusco fought near Mexico City

    Aug 20, 1847Labels: Churubusco, San Patricio

    • Churubusco

20. Scott lands at Veracruz and begins major siege

    Mar 9, 1847Labels: Veracruz, Winfield Scott

    • Siege Veracruz

21. Battle of Molino del Rey fought at capital’s edge

    Sep 8, 1847Labels: Molino del, Winfield Scott

    • Molino del Rey

22. U.S. forces capture Mexico City

    Sep 14, 1847Labels: Mexico City, U S

    • EBSCO

23. Battle of Chapultepec breaks key defenses

    Sep 12, 1847Labels: Chapultepec, Chapultepec Castle

    • Chapultepec
    • Britannica

24. Treaty of Guadalupe Hidalgo is signed

    Feb 2, 1848Labels: Treaty of, Nicholas Trist

    • Nat Archives
    • Britannica

25. U.S. forces enter and occupy Mexico City

    Sep 14, 1847Labels: Mexico City, Winfield Scott

    • History com
    • Britannica Timeline

26. U.S. Senate advises ratification with amendments

    Mar 10, 1848Labels: U S, ratification amendments

    • Nat Archives

27. Treaty of Guadalupe Hidalgo signed

    Feb 2, 1848Labels: Treaty of, Guadalupe Hidalgo

    • Britannica
    • Natl Archives

28. Ratifications are exchanged, ending the war

    May 30, 1848Labels: Ratifications exchange, United States

    • Nat Archives

29. U.S. Senate approves treaty with amendments

    Mar 10, 1848Labels: U S, Treaty Amendments

    • Natl Archives
    • Capitol

30. Treaty is proclaimed; Mexican Cession reshapes U.S.

    Jul 4, 1848Labels: Mexican Cession, Treaty proclamation

    • Nat Archives
    • Britannica

31. Ratifications exchanged at Querétaro

    May 30, 1848Labels: Ratification Exchange, Quer taro

    • Natl Archives
    • Treaty Wiki

32. Treaty of Guadalupe Hidalgo proclaimed

    Jul 4, 1848Labels: Treaty Proclamation, Guadalupe Hidalgo

    • Natl Archives