become part of Canada
...that the Canadian Arctic islands did not become part of Canada until 1880?
...that the <a class="mw-redirect" href="./Canadian_Arctic_islands" id="mwCVI" rel="mw:WikiLink" title="Canadian Arctic islands">Canadian Arctic islands</a> did not <b id="mwCVM"><a href="./Territorial_evolution_of_Canada" id="mwCVQ" rel="mw:WikiLink" title="Territorial evolution of Canada">become part of Canada</a></b> until <a href="./1880" id="mwCVU" rel="mw:WikiLink" title="1880">1880</a>?