At the Convention of 1818, the western border of the United States and Canada was established at the 49th parallel. The convention ended ongoing disputes about the borders between the two countries and was a major step in the reconciliation of the United States and Great Britain.
In addition to establishing a western border for the United States and Canada, the Convention of 1818 also restored fisherman's rights in certain waters for which control was in dispute between the United States and Great Britain, which ruled Canada at the time. The United States and Great Britain decided to share control of the Oregon territory, which had also been in dispute, for 10 years from the date of the convention. Land, citizens and slaves that had been captured during the War of 1812 were restored to their respective nations. Although the settlement and restoration of lands in dispute did a lot to ease the ongoing tensions between the United States and Great Britain and facilitated peaceful relations between the two nations, it also laid a sound foundation for good will relations between the United States and Canada. To date, the United States and Canadian border is the longest unguarded border in the world at 3,987 miles in length.