Duchy of Wrocławball was an independent child of Duchy of (Lower) Silesiaball. Later it joined Kingdom of Bohemiaball.
History
Duchy of Wrocławball started back when it was a 2ball, then they formed Germaniaball, then after the Romans collapsed, the Germans (Germanics) spreaded into Western Europe, then the Frankish Empireball came along, then forming the HREball.