The president made no attempt to obtain another treaty, and as a result, the two nations drifted from peace toward the War of 1812. Monroe was severely pained by the administration's repudiation of the treaty, and he fell out with Secretary of State James Madison. As President Jefferson's special envoy, Monroe helped negotiate the Louisiana Purchase, through which the United States nearly doubled in size. Monroe fell out with his longtime friend James Madison after Madison rejected the Monroe–Pinkney Treaty that Monroe negotiated with Britain. Monroe's mother died in 1772, and his father two years later. Though he inherited property from both of his parents, the 16-year-old Monroe was forced to withdraw from school to support his younger brothers. The Treaty of 1818, also with Great Britain, was concluded October 20, 1818, and fixed the present Canada–United States border from Minnesota to the Rocky Mountains at the 49th parallel. The accords also established a joint U.S.–British occupation of Oregon Country for the next ten years.
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