Roman emperor <a href="https://en.wikipedia.org/wiki/Julian_(emperor)" id="mwHQ" rel="mw:WikiLink" title="Julian (emperor)">Julian</a> is killed during the retreat from the <a href="https://en.wikipedia.org/wiki/Sasanian_Empire" id="mwHg" rel="mw:WikiLink" title="Sasanian Empire">Sasanian Empire</a>.