<a href="https://en.wikipedia.org/wiki/Constantius_III" id="mwEQ" rel="mw:WikiLink" title="Constantius III">Constantius III</a> becomes <a href="https://en.wikipedia.org/wiki/Roman_emperor" id="mwEg" rel="mw:WikiLink" title="Roman emperor">co-emperor</a> of the <a href="https://en.wikipedia.org/wiki/Western_Roman_Empire" id="mwEw" rel="mw:WikiLink" title="Western Roman Empire">Western Roman Empire</a>.<sup about="#mwt15" class="mw-ref reference" data-mw='{"name":"ref","attrs":{},"body":{"id":"mw-reference-text-cite_note-1"}}' id="cite_ref-1" rel="dc:references" typeof="mw:Extension/ref"><a href="./February_8#cite_note-1" id="mwFA" style="counter-reset: mw-Ref 1;"><span class="mw-reflink-text" id="mwFQ">[1]</span></a></sup>
<span class="mw-reference-text" id="mw-reference-text-cite_note-1"><cite about="#mwt12" class="citation web cs1" id="mwCMg"><a class="external text" href="https://www.britannica.com/biography/Constantius-III" id="mwCMk" rel="mw:ExtLink nofollow">"Constantius III | Biography &amp; Facts"</a>. <i id="mwCMo">Encyclopædia Britannica</i>. <a class="external text" href="https://web.archive.org/web/20221216212934/https://www.britannica.com/biography/Constantius-III" id="mwCMs" rel="mw:ExtLink nofollow">Archived</a> from the original on 2022-12-16<span class="reference-accessdate" id="mwCMw">. Retrieved <span class="nowrap" id="mwCM0">2023-11-09</span></span>.</cite><span about="#mwt12" class="Z3988" id="mwCM4" title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=unknown&amp;rft.jtitle=Encyclop%C3%A6dia+Britannica&amp;rft.atitle=Constantius+III+%7C+Biography+%26+Facts&amp;rft_id=https%3A%2F%2Fwww.britannica.com%2Fbiography%2FConstantius-III&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AFebruary+8"></span></span>