Walter Sans Avoir refers to a concept related to the Crusades, specifically involving the consequences of the Crusades on European society and culture. It encapsulates the idea of individuals who participated in the Crusades without fully grasping the motivations and implications behind their actions, often influenced by the rhetoric of religious fervor and chivalry. This term highlights how many crusaders were driven by a mix of noble intentions and a lack of understanding of the complex realities surrounding the Crusades.