1Oregon Country
A treaty with Great Britain finalized the Oregon border at the 49th parallel in 1846
2Mexican Cession
Following the U.S.-Mexican War, the U.S. got this vast territory in the Treaty of Guadalupe-Hidalgo
3Gadsden Purchase
U.S. purchased this land from Mexico to build a transcontinental railroad.
4Texas Annexation
Texas was annexed to the U.S. after winning its independence from Mexico.
5Louisiana Purchase
Jefferson's 1803 purchase doubled the size of the nation, secured the port of New Orleans and the use of the Mississippi River
6Convention of 1818
J.Q.Adams negotiated the northern border at the 49th parallel and right of Americans to settle in Oregon
7Treaty of Paris 1783
Ohio River Valley obtained after Americans won the Revolutionary War
813 Colonies
Established by Great Britain for gold, escaping religious persecution, trade, and social reasons
9Webster-Asburton Treaty
Settled border disputes between British Canada and Maine, establishing a good negotiating relationship with Britain.
10Florida Cession
U.S. got Florida for \$5 million in the Adams-Onis Treaty