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The U.S. Congress signs the admission of Texas
Making it the 28th state of the American Union.
Mexico considers it a reason for war. -
President James K. Polk orders General Zachary Taylor to occupy the disputed
Occupy the disputed territory between the Nueces River and the Rio Grande River. -
Skirmish of U.S. forces
Skirmish of U.S. forces against Mexican troops: it is the pretext to officially declare war. -
Polk officially declares war on Mexico.
Backed by the people and by Congress. With the speech "American blood has been spilled on American land." -
Defeat in Palo Alto
The US won the first battle of the confict.
The U.S. Navy begins blockade in the Gulf of Mexico. -
Mexico responded late to the U.S. attack
The United States had already secured the states of Alta California and New Mexico. -
National Guard
The National Guard is formed with Mexicans from 16 to 50 years of age for the defense of the nation. -
Battle of Monterrey
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Period: to
Battle of Monterrey
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Santa Anna's appointment
The Congress names Santa Anna -again- president of the Republic and Valentín Gómez Farías vice-president. -
Battle of La Angostura
Battle of La Angostura (Coahuila). There is no clear winner and General Santa Anna begins his retreat towards the center of the country. -
General Winfield Scott bombards Veracruz.
The National Guard troops remain in the capital used by the warring political factions to occupy the government. It is the rebellion of "the polkos". -
Capitulation of Veracruz to the U.S. army
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The last stand
Combat in Mexico City. On the 13th Chapultepec Castle falls, the last bastion of the capital. The following morning the United States flag flies over the National Palace. The Mexican government moves to Querétaro. -
Signing of the Treaty of Guadalupe Hidalgo
Mexico accepts the loss of half of its territory. -
The last U.S. troops leave Mexico.