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Henry Clay to become the eleventh president
1844
June 6 - U.S. Senate defeats treaty of annexation withTexasx November - James K. Polk defeats Henry Clay to become the eleventh president of the United State. December 5-7 - Santa Anna deposed; José Joaquín Herrera elected as interim president of Mexico -
government forces
1845
January 2-10 - Santa Anna attacks Puebla January 14 - Santa Anna captured by government forces March 1 - U.S. President John Tyler signs the Brown Resolution, offering Texas terms of annexation -
Mexican-american war
October 9 - Battle of Huaman October 12 - Siege of Puebla ends December 22 - Abraham Lincoln presents his "spot resolutions" in Congress, challenging Polks' reasons for declaring war against Mexico -
Mexican-american war
1846
January 1 - The Yucatán declares its independence from Mexico and its neutrality in the war with the United States January 4 - General Mariano Paredes takes the oath of office as president in Mexico City January 13 -President Polk orders Zachary Taylor to march from Corpus Christi to the Rio Grande and orders a blockade of Vera Cruz -
Mexican-american war
1847
January 2 - Battle of Santa Clara, California January 8 - Battle of Rio San Gabriel (Los Angeles), California January 9 - Battle of La Mesa (Los Angeles), California -
Mexican-american war
1848 January 24 - Gold discovered at Sutter's Mill, northern California February 2 - Treaty of Guadalupe Hidalgo signed February 4 - Last battle of the war fought at Santa Cruz de Rosales, New Mexico -
Mexican-american war
March 10 - U.S. Senate ratifies Treaty of Guadalupe Hidalgo, with amendments May 25 - Mexican Congress ratifies Treaty of Guadalupe Hidalgo June 3 - José Joaquín Herrera elected to the two-year presidential term -
Mexican-american war
August 20 - Battle of Churubusco; San Patricio battalion captured September 8 - Battle of Molino Del Rey September 13 - Battle of Chapultepec -
Mexican-american war
September 13-14 - Battle for Mexico City September 14 - Siege of Puebla begins September 15 - Santa Anna resigns as president of Mexico; U.S. forces under General Winfield Scott occupied Mexico City -
Mexican-american war
June 3 - José Joaquín Herrera elected to two-year presidential term July 4 - President Polk formally announces ratification of Treaty of Guadalupe Hidalgo August 2 - Last U.S. troops leave Mexico
