Crisis of the Piast dynasty

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Crisis of the Piast dynasty (1028-1058)
Part of German–Polish War Polish-Russian Wars
Return of Casimir I the Restorer to Poland
Date 1028–1058 (30 years) Location Poland, Lusatia, Pomerania Result German-Ruthenian-Bohemian victory Territorial changes Loss of Lusatia, Milsko, Western Pomerania and Bełz by Poland
Belligerents
Kingdom of Poland	Holy Roman Empire Kievan Rus Duchy of Bohemia Kingdom of Hungary Miecław's State Yotvingians Old Prussians
Commanders and leaders
Mieszko II Lambert Casimir I the Restorer	Conrad II Yaroslav the Wise Bretislav I Miecław Stephen I of Hungary Otto Bolesławowic Harald Hardrada
Casualties and losses
Heavy	Unknown

The Crisis of the Piast dynasty was a period of constant wars, invasions and rebellions, lasting from the death of Bolesław the Brave in 1025 until the reunification of the Polish lands by Casimir the Restorer. During the crisis, Poland suffered very severe material and demographic losses, the Polish capital Gniezno was completely destroyed, Lusatia and Milsko were taken over by the Germans and Bełz by Kievan Rus. This period ended in 1058 after Casimir the Restorer unified the country, but the Polish state was greatly weakened.