<a href="https://en.wikipedia.org/wiki/First_Crusade" id="mwKg" rel="mw:WikiLink" title="First Crusade">First Crusade</a>: The <a href="https://en.wikipedia.org/wiki/Siege_of_Jerusalem_(1099)" id="mwKw" rel="mw:WikiLink" title="Siege of Jerusalem (1099)">Siege of Jerusalem</a> begins.