Reign of Casimir IV Jagiellon

Timeline

1. 1451–1453Kraków · PolandCasimir IV convened the noble assembly in Kraków, balancing the interests of the magnates and the crown, regularizing demesne revenues, and strengthening patronage of lesser nobles to counter magnate factions, raising resources for future foreign wars.
2. 1453–1454Danzig · PrussiaCasimir IV exploited the resentment of cities such as Danzig over the Order's heavy taxes, diplomatically supported the Prussian cities' uprising, and won over the pope and Bohemian allies, creating the political conditions for the outbreak of war in 1454.
3. 1454–1460Prussia · PrussiaAfter the outbreak of the Thirteen Years' War, Casimir IV personally led forces to besiege Malbork and other strongholds; despite early setbacks he kept mobilizing Polish-Lithuanian forces and the allied Prussian cities, gradually incorporating the war into a long-term royal strategy and consolidating Jagiellonian hegemony in Eastern Europe.