The <a href="https://en.wikipedia.org/wiki/Fourth_Crusade" id="mwHQ" rel="mw:WikiLink" title="Fourth Crusade">Fourth Crusade</a> assaults <a href="https://en.wikipedia.org/wiki/Constantinople" id="mwHg" rel="mw:WikiLink" title="Constantinople">Constantinople</a>. The <a class="mw-redirect" href="https://en.wikipedia.org/wiki/Byzantine_emperor" id="mwHw" rel="mw:WikiLink" title="Byzantine emperor">Byzantine emperor</a> <a href="https://en.wikipedia.org/wiki/Alexios_III_Angelos" id="mwIA" rel="mw:WikiLink" title="Alexios III Angelos">Alexios III Angelos</a> flees from his capital into exile.