Emperor Allexius Commnenus never realized the impact his plea for help would have on his city and world of the east. Pope Urban II agreed to help with the invasion of the Seljuk Turks who had besieged the Byzantine Empire and were preventing the pilgrims to reach the holy land. Therefore the launching of aimed expeditions began. The crusades were the armed expeditions to the east, Constantinople and the Holy Land.

The Pope's Urban speech in the fall of 1095 in the city of Clermont united all classes of people in a joined effort to help Christians and restore peace in the east. For Urban II this was also an opportunity to regain power and prestige for himself at the expense of his rival who was the pope in the Rome of the east. Subsequently he was able to form an army of the crusades who eagerly started on...