The Crusades arose after a call to arms by Pope Francis II.
 The work of William of Tyre, Historia Rerum in Partibus Transmarinis Gestarum, and its continuations by later historians complete the foundational work of the traditional Crusade
 The enthusiastic crowd responded with cries of Deus lo volt!  "God wills it!"Immediately after Urban's proclamation, the French priest Peter the Hermit led thousands of mostly poor Christians out of Europe in what became known as the People's Crusade

