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U.S. acquires Florida.
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Americans begin moving into Texas.
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The trail is first created. Americans begin using the same route soon after.
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President James Monroe takes a bold stance against European intervention in the western hemisphere.
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Treaty is signed, and Texas officially has its independence.
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Americans begin using the Oregon Trail to travel west.
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The phrase "Manifest Destiny" is first published by John L. O'Sullivan.
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American and British governments agree to split Oregon Country at latitude 49 degrees north.
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Gold is found at Sutter's Mill. Gold Rush gets underway.
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American receive the Mexican Cession.
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Gold rush peaks.
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