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Louisiana Purchase
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Lewis and Clark Expedition
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Adams-Onis Treaty, Spanish Cession
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Missouri Compromise
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Monroe Doctrine
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Building of the Erie Canal
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Indian Removal Act
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Texas Revolution
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Oregon Trail
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John L. O'Sullivan coined the term Manifest Destiny
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Annexation of Texas
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Oregon Treaty, Seperated the U.S. and Britain along the 49th Parallel
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Brigham Young leads Mormons to Utah
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California Gold Rush
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Treaty of Guadalupe Hidalgo, Gave the U.S. the Southern States
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Gadsden Purchase, Present Day Arizona & New Mexico
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Kansas-Nebraska Act
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Homestead Act
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Transcontinental Railroad Completion
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Enabling Act of 1889, added four new states
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Oklahoma Land Run of 1889