Wisconsin War LetterS  Timeline  War with mexico

1846 
 

• January 1 - President Polk orders General Zachary Taylor to advance to the Rio Grande from his position on the Nueces River.
• April 17 - Alexander Conze Letter
• April 25 - Thornton Affair. 
• May 3-9 - Siege of Fort Texas.
• May 8 - Ballte of Palo Alto. Mexican forces crosses the Rio Grande at Palo Alto and a battle with the Americans ensues.
• May 9 - Battle of Resaca de la Palma.
• May   - President Polk addresses Congress.  War is declared.
• July 2 - Alexander Conze/Hermann Upmann Letter
• July 4 - Captain John C. Fremont proclaims the independence of California.
• July 7 - Navy Commodore John D. Sloat takes Monterey, California.
• July 8 - Sloat seizes Yerba Buena (modern San Francisco).
• September 10 - Hermann Upmann Letter
• September 20-24 - Battle of Monterrey
• October 7 - Battle of Dominguez Rancho.
• November 16 - Battle of Natividad.
• December 6 - Battle of San Pasqual. 
• December 25 - Battle of El Brazito. 
   

• January 2 - Battle of Santa Clara.
• January 8 - Battle of Rio San Gabriel (Los Angeles).
• January 9 - Battle of La Mesa (Los Angeles).
• January 24 - Battle of La Canada.
• January 24 - Battle of Mora.
• January 29 - Battle of Embudo Pass.
• February 3-4 - Siege of Pueblo de Taos. 
• February 23 - Battle of Buena Vista - General Taylor's 4,700 soldiers withstand the attack of Santa Anna's 20,000 Mexicans.  The Mexicans withdraw.
• February 28 - Battle of the Sacramento.
• March 9-29 - Siege of Veracruz. 
• March 27 - General Winfried Scott captures the fort on the harbor of Veracruz.
• April 18 - General Scott, with 800 men, drives 15,000 Mexicans from the pass of Cerro Gordo.
• June 6 - Affair at Las Vegas, New Mexico.
• July 17 - Jason Evans Letter
• August 19-20 - Battles of Contreras and Churubusco.
• September 8 - Battle of El Molino del Rey. 
• September 13 - Battle of Chapultepec.
• September 13-15 - Battles for Mexico City. 
• September 14 - American troops enter Mexico City.
• September 14-Oct. 12 - Siege of Puebla. 
• October 5 - Huamantla Affair.
• October 19 - Atlixco Affair. 
• October 26 - Juan Lehmann Letter
   

1848 

• February 2 - Treaty of Guadalupe-Hidalgo.
• August 26 - James Huntington Letter