Answer:
On May 12, 1846, the United States Senate voted 40 to 2 to go to war with Mexico. President James K. Polk had accused Mexican troops of having attacked Americans on U.S. soil, north of the Rio Grande. But Mexico claimed this land as its own territory and accused the American military of having invaded. The Treaty of Guadalupe Hidalgo was signed in 1848, the treaty allowed the United States to purchase California, Arizona, New Mexico, Texas, Nevada, Utah, and Colorado for fifteen million dollars, doubling the size of the United States, but also displacing millions of Mexican citizens in new American territory. Mexico also gave up all claims to Texas and recognized the Rio Grande as America's southern boundary.
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One of the greatest impacts that Ford's assembly line had on changing American lifestyle was that it put the individual's focus on a specific task, which made employees specialize in a single task as opposed to many--making them more skilled.
The empire state building.
Diving power between central and state govt.
right to bear arms
18 yr olds gain right to vote
