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Background. On February 2, 1848, the United States and Mexico signed the treaty of Guadalupe-Hidalgo. ... Mexico also agreed to sell its New Mexico and Upper California territories to the United States at a price of $15 million. The treaty effectively halved the size of Mexico and doubled the territory of the United States
The treaty of Guadalupe is important in the history of the United States because this treaty was what ended the war with Mexico and caused the territory of the United States to increase in size.
The treaty of Guadalupe was signed in the year 1848. The treaty was very important because this was what brought an end to the American-Mexican war.
The treaty had Mexico giving up its claims to the state of Texas to the United states. It grew the United States up to the pacific and also gave it the resources in the mineral rich Texas.
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