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Royal Proclamation of 1763
The King of England declared that Americans cannot attempt to colonize in the Ohio River Valley. -
Louisiana Purchase
the U.S. purchased the French territory of Louisiana for $15 million. -
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Lewis and Clark Expedition
Captain Meriwether Lewis and Second Lieutenant William Clark voyaged across the North American continent and were the first to reach the Pacific Ocean overland. They were also the first to map out the continent. -
The Indian Removal Act
After Americans found gold on natives' lands, they passed a law forcing natives to move to Oklahoma on the Trail of Tears so that the natives wouldn't come in their way. -
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Mexican-American War
The Mexicans and Americans fought for territory, resulting in a US victory. This is how Texas and other Mexican-controlled territories became American states. -
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California Gold Rush
Settlers 'rush' to California because of the recent discovery of gold.