Western Expansion Treaties

Treaty of Paris of 1783

Louisiana Purchase

Louisiana Purchase

Convention of 1818 clarified the northern border of the Louisiana Purchase. The land acquired by the United States in the treaty, known as the Red River Basin, would ultimately become part of the states of Minnesota and North Dakota.

Convention of 1818

Adams-Onis Treaty Spain sold Florida to United States for $5 million. The U.S. agreed to assume coverage of the financial claims of Florida residents against the Spanish government. Spain gave up its claims to Oregon north of the 42nd parallel. (impact) Spain kept Texas, California and New Mexico. (impact)

Adams-Onis Treaty

Adams-Onis Treaty

Texas Annexation

Webster-Ashburton Treaty The U.S. and Britain established the northeastern boundary of the U.S. Secretary of State, Daniel Webster and Britain’s ambassador Lord Ashburton negotiated the treaty. It provided for the Anglo-U.S. cooperation in the suppression of the slave trade. It finalized the present boundary between Maine and New Brunswick. (impact) It granted the U.S. navigation rights on the St. John River. (impact) It provided for extradition in nonpolitical criminal cases. (impact) It established a joint naval system for suppressing the slave trade off the African coast. (impact)

Webster-Ashburton Treaty

Oregon Treaty It was an agreement between Great Britain and the United States. It was negotiated by James Buchanan and Richard Packanham. It gave the U.S. claim to the Northwest area south of the 49th parallel. (impact) Great Britain was able to keep Vancouver Island. (impact)

Oregon Treaty

Treaty of Guadalupe Hildalgo Ended the war between the U.S. and Mexico in 1848; the U.S. acquired a large land area that today makes up the southwestern part of the U.S.

Treaty of Guadalupe Hildago

Gadsden Purchase Purchased by the United States from Mexico in 1853 to complete the Transcontinental Railroad to the Pacific coast

Gadsden Purchase