<a href="https://en.wikipedia.org/wiki/Fourth_Crusade" id="mwIQ" rel="mw:WikiLink" title="Fourth Crusade">Fourth Crusade</a>: Despite letters from <a href="https://en.wikipedia.org/wiki/Pope_Innocent_III" id="mwIg" rel="mw:WikiLink" title="Pope Innocent III">Pope Innocent III</a> forbidding it and threatening <a href="https://en.wikipedia.org/wiki/Excommunication" id="mwIw" rel="mw:WikiLink" title="Excommunication">excommunication</a>, Catholic crusaders <a href="https://en.wikipedia.org/wiki/Siege_of_Zara" id="mwJA" rel="mw:WikiLink" title="Siege of Zara">begin a siege</a> of Zara (now <a href="https://en.wikipedia.org/wiki/Zadar" id="mwJQ" rel="mw:WikiLink" title="Zadar">Zadar, Croatia</a>).