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Texas is annexed by the U.S. becoming the the 28th state. Mexico still claims Texas.
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Mariano Paredes becomes the President of Mexico. General Mariano Paredes refuses to meet with U.S. representative.
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Zachary Taylor marches to the Rio Grande.
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President Predes announces that he will be defending Mexico against a U.S. invasion in Texas.
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Arrival of the U.S. Army at the Rio Grande. They begin to build a fort. -
General Mariano Arista arrives in Matamoros and ordere soldiers to cross the Rio Grande.
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U.S. fort is under attack by the Mexican Army.
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U.S. fort is bombarded with canonballs by Mexican troops.
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Both armies fight to a standstill adn spend the night on the battlefield.
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Mexican Army is defeated and pushed back to Matamoros.
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President Polk asks Congress to declare war on Mexico. -
The U.S. declares war on Mexico.
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The U.S. occupies Matamoros.
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U.S. victory on Battle of Monterrey.
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U.S. victory on Battle of Buena Vista.
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The Siege of Vera Cruz begins
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Siege of Vera Cruz Ends.
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U.S. victory at the Battle of Chapultepec.
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The U.S. troops now occupy Mexico City.
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A treaty is signed, this treaty is named "The Treaty of Guadalupe Hidalgo" which established the Rio Grande as the boundary separating the United States from Mexico.