What major geographic event led to the formation of the United States' borders in the 19th century? 🔊
The major geographic event that led to the formation of the United States' borders in the 19th century was the Louisiana Purchase. In 1803, the U.S. acquired this vast territory from France, doubling the size of the nation and providing significant economic and political benefits. This acquisition facilitated westward expansion, encouraging settlement and exploration while influencing relationships with Native American tribes and neighboring territories. It set the stage for future conflicts and territorial negotiations, impacting the nation's growth and its path toward becoming a continental power. The Louisiana Purchase remains a pivotal moment in American history.
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