Albert's most important contribution to the history of Brandenburg was the issue on the 24th of February 1473 of the Dispositio Achillea.
Ignoring the Dispositio Achillea, the elector bequeathed Brandenburg to his two sons.
This indifference to the welfare of the Protestants added to the estrangement between the elector and his eldest son, which was further accentuated when John George, ignoring the Dispositio Achillea, bequeathed the new mark to one of his younger sons.
This agreement, known as the Gera Bond, ratified the Dispositio Achillea.
Having established his right to levy a tonnage on wines in the mark, he issued in February 1473 the important dispositio Achillea, which decreed that the mark of Brandenburg should descend in its entirety to the eldest son, while the younger sons should receive the Franconian possessions of the family.