Pope Urban's Beginnings

I was curious about Pope Urban's role in the Church before his papacy and the beginnings of the First Crusade, so I found some information at the following site: http://www.catholiceducation.org/articles/history/world/wh0010.html. Before Pope Urban II became Pope, he was held prisoner by Henry IV and served as assistant to Pope Gregory. During the early years of his reign, he improved ecclesiastical discipline and called for the Council of Clermont in November 1095, which began the First Crusade. Due to strong sentiments against Urban made by the Countless Matilda of Tuscany, Pope Urban had to wait six years until he was allowed to sit on the papal throne. Soon after taking the throne, Urban's call to arms for the defense of Christians and the acquisition of the Holy Land led to the People's Crusade followed soon after by the slightly more organized majority of the army for the First Crusade.