Agreement rush-bagot concluded in 1817. U.S. Secretary of State James Monroe proposed to british Foreign Minister Lord Castlereagh in 1816 that the two countries agree to limit naval armament to one ship on Ontario lakes and Champlain and 2 to Upper Lakes. Thus, 1817 notes were exchanged between the current Minister of Foreign Affairs, Richard Rush, and Sir Charles Bagot, the British minister in Washington. In addition to the issue of great lakes military navigation, the British government was also open to negotiations on a number of other contentious issues that had not been resolved by the Treaty of Gant. Several committees have met to settle border disputes along the U.S. border with Britain. One of these commissions allocated several islands off the coast of Maine to New Brunswick. However, negotiators have blocked other parts of the northern borders of Maine and New Hampshire. This issue was resolved only by the Webster-Ashburton Treaty of 1842, which also resolved the border between Canada and northeastern Minnesota. 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.  An Ontario Heritage Trust plaque in Kingston, Ontario, recognizes the Rush Bagot Agreement (44-13`48`N 76-27-59`W / 44.22989 N 76.466292-W / 44.229894; -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 origins of the Rush Bagot Treaty can be attributed to correspondence between US Secretary of State Richard Rush and British Minister in Washington Sir Charles Bagot, exchanged and signed on 27 and 28 April 1817. After the terms of Rush and Bagot`s notes were agreed, the Rush Bagot agreement was informally recognized by both countries. On April 16, 1818, it was introduced to the U.S.
Senate and formally ratified on April 16, 1818. The treaty eventually resulted in the Washington Treaty in 1871, which concluded disarmament.