-
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
-
The Lewis and Clark Expedition explores and map the US lands bought in the 1803 Louisiana Purchase
-
The first Important migration of settlers traveled in Wagon Trains along the 2000 mile Oregon Trail
-
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
-
The Convention and Treaty of 1818 with the British establishes the border with Canada at the 49th Parallel
-
Between 1830 to 1840 the forced migration included the terrible journey of the Creek nation on the infamous Trail of Tears
-
The California Gold Rush (1848–1855) started when gold was discovered at Sutter's Lumber Mill in Coloma, California
-
The short lived Pony Express was established as the most direct means of east–west communication before the telegraph was established
-
The Transcontinental Railroad was completed joining the eastern and western parts of the United States
-
Arizona was admitted to the Union as the last of the 48 contiguous (adjoining) states.
