Rush-Bagot Agreement, finalized Apr 1817. US Secretary of State James Monroe proposed to British Foreign Secretary Lord Castlereagh in 1816 that the 2 countries should agree to limit naval armaments to one ship each, on Lakes Ontario and Champlain, and 2 each on the Upper Lakes. Thus, in 1817, notes were exchanged between Acting Secretary of State Richard Rush and Sir Charles Bagot, British minister in Washington.
Since naval disarmament of the lakes was virtually complete after 1817, the Rush-Bagot Agreement is considered to have ended the British-US naval race and is frequently cited as the diplomatic origin of the friendly international border. In fact, only naval power on the lakes was affected, for the US and Britain continued to build land fortifications along the border for the next half century.