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Treaty of Paris
The War of Independence (1775–1783) ends, and the U.S. acquires the first 13 colonies in the east by the Treaty of Paris that establishes the first U.S. boundaries -
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Lewis and Clark Expedition
The Lewis and Clark Expedition explores and map the US lands bought in the 1803 Louisiana Purchase -
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Oregon Trail
The first Important migration of settlers traveled in Wagon Trains along the 2000 mile Oregon Trail -
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War of 1812
The War of 1812 resulted in the people of America thinking of itself as a unified and strong nation increasing the urge for Westward Expansion -
1818 Convention and Treaty
The Convention and Treaty of 1818 with the British establishes the border with Canada at the 49th Parallel -
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Trail of Tears
Between 1830 to 1840 the forced migration included the terrible journey of the Creek nation on the infamous Trail of Tears -
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California Gold Rush
The California Gold Rush (1848–1855) started when gold was discovered at Sutter's Lumber Mill in Coloma, California -
Pony Express
The short lived Pony Express was established as the most direct means of east–west communication before the telegraph was established -
Transcontinental Railroad
The Transcontinental Railroad was completed joining the eastern and western parts of the United States -
Arizona
Arizona was admitted to the Union as the last of the 48 contiguous (adjoining) states.
