The Louisiana Purchase doubled the size of the United States in October 20, 1803.
Lewis and Clark began there iconic expedition in May 1804.
On August 15-16, 1812 the U.S. won back the Fort of Detroit.
On June 15th, 1818, The United States signed a treaty with Great Britain to establish the border between the US and Canada.
The Adam-Onis treaty gave the U.S. Florida official on February 22, 1819.
California was admitted as a state on September 9, 1850.
The Cherokees were led on the Trail of Tear from 1838 to 1839.
This treaty gave a definite border between Maine and Canada.
The Republic of Texas became the state of Texas on December 29, 1845.
The Oregon Territory was seceded to the U.S. by Great Britain in 1846.
Mexico and America went to war for two year from 1846-1848.
The California Gold Rush pushed people to settle in the West.
In 1848 we bought a huge chunk of the West Coast from Mexico.
In 1853 the U.S. purchased about 30,000 square miles next to the Gila River.
The homestead act was passed to allow people to settle the land in 1862 for free.