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Louisianna Purchase Treaty signed by James Monroe and others on July 4.
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President James Madison proclaimed the annexation of West florida on, October 27, 1810
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Great Britain and the United States agreed to have a boundary line on the 49th parallel.
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The republic of Texas wanted to join the Americas after seceding from Mexico. Their annexation was official on February 19, 1846.
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United States got more colonists to the Oregon territory and then Britain gave it to us.
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We acquired modern SouthWest America from Mexico.
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This purchase aimed to reduce border tension between the United States and Mexico.