Page "Albrecht III Achilles, Elector of Brandenburg" Paragraph 11

In 1474, Albert married his daughter Barbara to Duke Henry XI of Głogów, who left his possessions on his death in 1476 to his widow with reversion to her family, an arrangement which was resisted by Henry's kinsman, Duke Jan II of Żagań.

Aided by King Matthias Corvinus of Hungary, Jan of Żagań invaded Brandenburg, and the Pomeranians seized the opportunity to revolt.

Under these circumstances Albert returned to Brandenburg in 1478, compelled the Pomeranians to recognize his supremacy, and, after a stubborn struggle, secured a part of Duke Henry's lands for his daughter in 1482.