Miecław's Rebellion

Masovia from the Duchy of Poland in c. 1037. It ended in 1047 with Miecław's death and the state being reconquered by Poland.^[1]

Masovia from the rest of Poland, and started his own royal dynasty.^[1]

Duchy of Pomerelia and the Yotvingians. In the spring of 1041, he began the campaign against Polish forces.^[3] Miecław's forces met the army led by Casimir and Yaroslav in the Battle of Pobiedziska. The battle ended with a decisive Polish victory and the destruction of Miecław's army and led to the signing of a truce between both sides.^[3][4]

battle of their forces against the forces of Miecław and Pomerelia.^[5][6] The location of this battle remains unknown in modern times, though it was known to the 11th-century historian Gallus Anonymus, according to whom it took place near the river with the bluff edge. According to Gallus, Miecław's forces had 30 divisions of cavalry, while Casimir had three divisions. It is probable that he did not account for the forces of Yaroslav the Wise, and that both sides, in fact, had similar strength.^[5] The battle was probably initiated by Casimir I, who hoped to win before the arrival of the Pomerelian army. The battle itself was fierce, with numerous casualties on Miecław's side. It ended with a Polish victory, following which Miecław's state was reincorporated into the Duchy of Poland.^[5][6]