No, Pope Urban II did not leave the Crusades. He ordered the first crusade and gave speeches that rallied the men to take back the Holy Land from the Muslims. He called the people to wage war against the Seljuk Muslim Turks saying in one of his rallying speeches "Deus vult!" or "God wills it!" telling them to wage war and take back the Holy Land. Pope Urban II probably had one of the most influential roles in the Crusades, with his speech that rallied the Christian men to fight and take back the Holy Land.
Hope this helps you! (:
-Hamilton1757
