Crusade against Francesco Ordelaffi

The crusade against Francesco Ordelaffi (1356–1359) was an international military campaign to restore the temporal power of the Holy See over part of the Romagna. Resistance was led by Francesco II Ordelaffi, lord of Forlì and Cesena. The crusaders were initially successful in detaching Ordelaffi's allies. The intervention of mercenaries on Ordelaffi's side changed the nature of the war. Papal authority was eventually reimposed with the help of Hungarian troops.