Convention of 1818: US-Canada Border Set at the 49th Parallel
Britain and the United States signed the Convention of 1818, setting their border at the 49th parallel from the Lake of the Woods to the Rocky Mountains. The agreement left the Oregon Territory jointly occupied — both nations could settle there. That arrangement lasted until 1846, when they extended the 49th parallel to the Pacific. The border runs 5,525 miles, mostly undefended.
October 20, 1818
208 years ago
Key Figures & Places
Treaty of 1818
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49th parallel
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Canada–United States border
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United Kingdom of Great Britain and Ireland
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History of the United States
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Treaty of 1818
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Rocky Mountains
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Canada–United States border
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49th parallel north
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Oregon Country
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Historia de Canadá
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Geographische Breite
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