Miecław's Rebellion
| Miecław's Rebellion | |||||||
|---|---|---|---|---|---|---|---|
| Part of Crisis of the Piast dynasty | |||||||
The Duchy of Poland in 1037, including the borders of Miecław's State | |||||||
| |||||||
| Belligerents | |||||||
|
Duchy of Poland Kievan Rus' |
Miecław's State Duchy of Pomerelia Yotvingians | ||||||
| Commanders and leaders | |||||||
|
Casimir I the Restorer Yaroslav the Wise |
Miecław † Siemomysł | ||||||
Miecław's Rebellion (Polish: bunt Miecława) was a military conflict fought from c. 1037 to 1047 between the Duchy of Poland under Casimir I the Restorer and its ally, Kievan Rus', led by Yaroslav the Wise, against the forces of Miecław, the self-proclaimed leader of a breakaway state, who was allied with the Duchy of Pomerelia and the Yotvingians. The war began with the declaration of independence of Miecław's State in Masovia from the Duchy of Poland in c. 1037. It ended in 1047 with Miecław's death and the state being reconquered by Poland.