Treaty of 1818
Overview
 
The Convention respecting fisheries, boundary and the restoration of slaves between the United States of America and the United Kingdom of Great Britain and Ireland
United Kingdom of Great Britain and Ireland
The United Kingdom of Great Britain and Ireland was the formal name of the United Kingdom during the period when what is now the Republic of Ireland formed a part of it....

, also known as the London Convention, Anglo-American Convention of 1818, Convention of 1818, or simply the Treaty of 1818, was a treaty signed in 1818 between the United States
United States
The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 and the United Kingdom
United Kingdom of Great Britain and Ireland
The United Kingdom of Great Britain and Ireland was the formal name of the United Kingdom during the period when what is now the Republic of Ireland formed a part of it....

. It resolved standing boundary issues between the two nations, and allowed for joint occupation and settlement of the Oregon Country
Oregon Country
The Oregon Country was a predominantly American term referring to a disputed ownership region of the Pacific Northwest of North America. The region was occupied by British and French Canadian fur traders from before 1810, and American settlers from the mid-1830s, with its coastal areas north from...

, known to the British and in Canadian history as the Columbia District
Columbia District
The Columbia District was a fur trading district in the Pacific Northwest region of British North America in the 19th century. It was explored by the North West Company between 1793 and 1811, and established as an operating fur district around 1810...

 of the Hudson's Bay Company
Hudson's Bay Company
The Hudson's Bay Company , abbreviated HBC, or "The Bay" is the oldest commercial corporation in North America and one of the oldest in the world. A fur trading business for much of its existence, today Hudson's Bay Company owns and operates retail stores throughout Canada...

, and including the southern portion of its sister for district New Caledonia
New Caledonia (Canada)
New Caledonia was the name given to a district of the Hudson's Bay Company that comprised the territory largely coterminous with the present-day province of British Columbia, Canada. Though not a British colony, New Caledonia was part of the British claim to North America. Its administrative...

.

The treaty marked the last permanent major territorial loss of Continental United States, the northernmost tip of the territory of Louisiana above the 49th parallel north
49th parallel north
The 49th parallel north is a circle of latitude that is 49 degrees north of the Earth's equatorial plane. It crosses Europe, Asia, the Pacific Ocean, North America, and the Atlantic Ocean....

, known as the Milk River
Milk River (Montana-Alberta)
The Milk River is a tributary of the Missouri River, long, in the United States state of Montana and the Canadian province of Alberta. Rising in the Rocky Mountains, the river drains a sparsely populated, semi-arid watershed of , ending just east of Fort Peck, Montana.-Geography:It is formed in...

 in present day southern Alberta
Alberta
Alberta is a province of Canada. It had an estimated population of 3.7 million in 2010 making it the most populous of Canada's three prairie provinces...

.
 
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