The Cudgel War (also Club War, , ) was a 1596–1597 peasant uprising in Finland, which was then part of the Kingdom of Sweden. The name of the uprising derives from the fact that the peasants armed themselves with various blunt weapons, such as cudgels, flails and maces, since they were seen as the most efficient weapons against their heavily-armoured enemies. The yeomen also had swords, some firearms and two cannons at their disposal. Their opponents, the troops of Clas Eriksson Fleming, were professional, heavily-armed and armoured men-at-arms. Modern Finnish historiography sees the uprising in the context of the conflict between Duke Charles and Sigismund, King of Sweden and Poland (War against Sigismund). Charles agitated the peasants to revolt against the nobility of Finland, which supported Sigismund during the conflict. Background The 25-year war between the Kingdom of Sweden and the Tsardom of Russia had increased the tax burden, the most hated of which was the "castle camp", i.e. the accommodation, subsistence and payment of wages at the expense of the peasants. The peasants found it intolerable, in particular, that noble and inferior squires who equipped cavalry soldiers for the army were allowed to collect castle camp dues even when the soldiers were not at war, and that Klaus Fleming kept the army in the castle camp for many years after the war to keep it available for his use. There were many abuses and illegalities towards the peasants committed by the nobles and their armies in collecting castle camp dues. Other key explanations for the outbreak of cudgel warfare have included "the burdens of wartime and severe failed harvests, the chaos caused by war fatigue, political provocations, and the exploitation of peasants by a nobility who grew in number and wealth". War An uprising began on Christmas Eve 1595 and was initially successful, but shortly thereafter was crushed by cavalry. Officially, the Cudgel War began in Ostrobothnia with an attack by peasants on Isokyrö's church on November 25, 1596. The peasants won a number of encounters with infantry. Klaus Fleming began negotiating a truce that required the surrender of peasant leader Jaakko Ilkka. Ilkka fled to avoid being handed over and the peasant army scattered, pursued by the soldiers. At least 1500 were killed within the next two months. Along with Ilkka, five other rebellion leaders were executed on January 27, 1597. Israel Larsson was named as the new