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This overview of America's territorial expansion highlights pivotal events from the Louisiana Purchase in 1803 to the Gadsden Purchase in 1853. Key milestones include the annexation of Texas in 1845, the Mexican Cession in 1848, and the contribution of the 13 Colonies by 1781. The westward journey culminates at the Pacific Ocean, shaped by ambitions of manifest destiny. Understanding these territorial acquisitions helps us appreciate the complexities of America's growth and the geopolitical landscape of the 19th century.
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Oregon Territory 1846 Louisiana Purchase 1803 13 Colonies America by 1781 Mexican Cession 1848 Pacific Ocean Texas Annexation 1845 Atlantic Ocean Florida 1819 Gadsdsen Purchase 1853 Gulf of Mexico