The Stedinger Crusade was a Papally-sanctioned war against the rebellious peasants of Stedingen.
The Stedinger were free farmers and subjects of the Prince-Archbishopric of Bremen. Grievances over taxes and property rights turned into full-scale revolt. When an attempt by the secular authorities to put down the revolt ended in defeat, the archbishop mobilized his church and the Papacy to have a crusade sanctioned against the rebels. In the first campaign, the small crusading army was defeated. In a follow-up campaign the next year, a much larger crusader army was victorious.
It is often grouped with the Drenther Crusade and the Bosnian Crusade, other small-scale crusades against European Christians deemed heretical.