Roman Emperor <a href="https://en.wikipedia.org/wiki/Valentinian_I" id="mwJQ" rel="mw:WikiLink" title="Valentinian I">Valentinian I</a> appoints his brother <a href="https://en.wikipedia.org/wiki/Valens" id="mwJg" rel="mw:WikiLink" title="Valens">Flavius Valens</a> co-<a href="https://en.wikipedia.org/wiki/Emperor" id="mwJw" rel="mw:WikiLink" title="Emperor">emperor</a>.<sup about="#mwt23" class="mw-ref reference" data-mw='{"name":"ref","attrs":{},"body":{"id":"mw-reference-text-cite_note-3"}}' id="cite_ref-3" rel="dc:references" typeof="mw:Extension/ref"><a href="./March_28#cite_note-3" id="mwKA" style="counter-reset: mw-Ref 3;"><span class="mw-reflink-text" id="mwKQ">[3]</span></a></sup>
<span class="mw-reference-text" id="mw-reference-text-cite_note-3"><cite about="#mwt20" class="citation web cs1" id="mwB7w"><a class="external text" href="https://www.britannica.com/biography/Valentinian-I" id="mwB70" rel="mw:ExtLink nofollow">"Valentinian I | Roman emperor | Britannica"</a>. <i id="mwB74">www.britannica.com</i><span class="reference-accessdate" id="mwB78">. Retrieved <span class="nowrap" id="mwB8A">25 February</span> 2022</span>.</cite><span about="#mwt20" class="Z3988" id="mwB8E" title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=unknown&amp;rft.jtitle=www.britannica.com&amp;rft.atitle=Valentinian+I+%7C+Roman+emperor+%7C+Britannica&amp;rft_id=https%3A%2F%2Fwww.britannica.com%2Fbiography%2FValentinian-I&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AMarch+28"></span></span>