Although the agreements did not fully resolve border disputes and trade agreements, the Rush Bagot Agreement and the 1818 Agreement marked an important turning point in Anglo-American and American-Canadian relations. Although the treaty was a challenge during the First World War, its conditions were not changed. Similar problems arose before the Second World War, but Foreign Minister Cordell Hull wanted to maintain the agreement because of its historical importance. In 1939 and 1940, Canada and the United States agreed to interpret the treaty so that weapons would be installed in the Great Lakes, but would not be passable until the ships had left the lakes. In 1942, the United States, which had gone to war and allied with Canada, successfully proposed to install and test weapons in the lakes until the end of the war. In 1946, following discussions in the Permanent Joint Defence Council, Canada also proposed to interpret the agreement to allow the use of ships for training purposes when each country informs the other country.  The rush bagot pact was an agreement between the United States and Great Britain to eliminate their fleets from the Great Lakes, with the exception of small patrol vessels. The 1818 convention established the border between the territory of Missouri in the United States and British North America (later Canada) at the forty-ninth parallel. Both agreements reflected the easing of diplomatic tensions that led to the War of 1812 and marked the beginning of Anglo-American cooperation.
Mr. Bagot met informally with Foreign Affairs Minister James Monroe and finally reached an agreement with his successor, Current Minister Richard Rush. The agreement limited military navigation on the Great Lakes to one or two ships per country on each sea. The U.S. Senate ratified the agreement on April 28, 1818. The British government felt that an exchange of diplomatic letters between Rush and Bagot was sufficient to make the agreement effective. A plaque from the Ontario Heritage Trust in Kingston, in Ontario, recognizes the Rush Bagot Agreement (44-13`48`N 76-27`59`W / 44.229894 N 76.466292 N 76.466292-W / 44.29894; -76.4662922). A commemorative plaque is also located on the former site of the British envoy in Washington, D.C., D.C. (38-54`13.N 77-3`8.4`W / 38.903806 N 77.05233-W / 38.903806; -77.052333), where the agreement was negotiated. A monument is also located on the site of the Old Fort Niagara (43-15`N 79-03`49`W / 43.263347 N 79.063719 W / 43.263347; -79.063719), reliefs of Rush and Bagot, as well as the words of the treaty.  The Rush Bagot Agreement began as a series of letters addressed to Washington by US Secretary of State Richard Rush and British Minister in Washington Sir Charles Bagot. As soon as the terms of the agreement were reached, both sides began to follow them.
The treaty was officially ratified by the U.S. Senate on April 16, 1818. The U.S.-Canada border, from the Great Lakes to the Rockies, has been set at the 49th parallel. The Oregon Territory issue was to be resolved at a later date. The Canada-U.S. border has been demilitarized, including the Great Lakes and Lake Champlain. The United States and the British agreed on joint control of Oregon. The Rush Bagot Agreement laid the foundation for the world`s longest east-west border – 8,891 kilometres and the longest demilitarized border in the world.   While these commissions were debating border issues, Rush and Gallatin concluded the Anglo-American Convention of 1818, which notably upheld the permanent rights of the United States to fish off Newfoundland and Labrador.
The convention also provided for Russian mediation on the issue of runaway slaves at the hands of the United Kingdom (American slave owners eventually obtained financial compensation) and also found that the border ran from angle Inlet in the south to the 49th parallel, and then west with the Rockies.