The Thirteen Years’ War also called the War of the Cities, was a conflict between the Prussian Confederation supported by the Polish kingdom and the Order of the Order of the German Knights from 1454 to 1466. protest against the military and feudal dominance of the German order. Leading cities such as Danzig had strengthened themselves in the Baltic Sea trade with growing economic power, but the German order of knights held the dominant role politically. The opportunity came in January 1454, when King Casimir IV of Jagiello of Poland married Elisabeth of Habsburg.
