What most affected the agreement between united satiates and Great Britain over Canadian border?

The most significant factor that affected the agreement between the United States and Great Britain over the Canadian border was the War of 1812.

- War of 1812: The war between the United States and Great Britain from 1812 to 1815 had a profound impact on the border negotiations between the two countries. The war resulted in a stalemate, with neither side able to achieve a decisive victory. As a result, the peace negotiations that followed focused on resolving the outstanding territorial disputes between the United States and Great Britain, including the boundary between Canada and the United States.

- Treaty of Ghent: The war concluded with the signing of the Treaty of Ghent in 1814, which restored the pre-war boundaries between the United States and British North America (Canada). However, the treaty did not resolve all of the border disputes between the two countries, and further negotiations were necessary to determine the exact location of the boundary.

- Rush-Bagot Agreement: In 1817, the United States and Great Britain signed the Rush-Bagot Agreement, which limited the naval armaments on the Great Lakes and Lake Champlain. This agreement helped to reduce tensions between the two countries and facilitated the resolution of outstanding boundary disputes.

- Webster-Ashburton Treaty: In 1842, the United States and Great Britain signed the Webster-Ashburton Treaty, which finally resolved the remaining boundary disputes between the United States and Canada. The treaty established the current border between the United States and Canada, with minor adjustments made in subsequent agreements.