<a href="https://en.wikipedia.org/wiki/Treaty_of_1818" id="mwOg" rel="mw:WikiLink" title="Treaty of 1818">The Convention of 1818</a> is signed between the United States and the United Kingdom, which settles the <a href="https://en.wikipedia.org/wiki/Canada–United_States_border" id="mwOw" rel="mw:WikiLink" title="Canada–United States border">Canada–United States border</a> on the <a href="https://en.wikipedia.org/wiki/49th_parallel_north" id="mwPA" rel="mw:WikiLink" title="49th parallel north">49th parallel</a> for most of its length.