The People's Crusade refers to the first wave of the Crusades that occurred in 1096, initiated by common people rather than nobles or organized military leaders. This grassroots movement emerged in response to Pope Urban II's call for a holy war to reclaim Jerusalem from Muslim control and was characterized by its lack of formal structure, leadership, and military training. Ultimately, the People's Crusade ended in disaster, as many participants faced significant hardships and were defeated before they could reach their goal.