 Over the winter of 1319–20 Philip convened a number of meetings with French military leaders in preparation for a potential second expedition, that in turn informed Bishop William Durand's famous treatise on crusading.By the end of Philip's reign, however, he and John had fallen out over the issue of new monies and commitments to how they were spent, and the attentions of both were focused on managing the challenge of the Shepherds' Crusade.The Shepherds' Crusade, or the "Pastoreaux", emerged from Normandy in 1320.