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President John Tyler accepts Texas from Mexico and adds it into the Union.
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President Polk sends John Slidell to try to buy New Mexico and California, but the press finds out what they are doing and call President Herrera, the Mexican President, a traitor for going to sell the northern Mexican territories. Therefore President Herrera doesn't meet up with Slidell because he thinks public opinion will go against him.
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President Polk orders General Zachary Taylor to the Rio Grande and Commodore David Connor to Veracruz.
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President Polk asks Congress to declare war on Mexico and Congress agrees approving Polk $10 million and 50,000 volunteers.
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Taylor invades the city and defeats General Pedro de Ampudia as part of his plan to cut off Northern Mexico. This victory helps recruit more soldiers.
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The U.S. troops bomb Mexico City and since the Mexican troops don't have any reinforcements coming, they surrender.
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The treaty that states the U.S. will give Mexico $10 million for California, New Mexico, the border of Texas at the Rio Grande.