[1] Nevertheless, Albrecht's plans to re-unite the former Duchy of Franconia under his rule failed: in 1443, he formed a league directed mainly against the Imperial City of Nuremberg, over which his late father had formerly exercised the rights of burgrave.

After initial military successes in the First Margrave War, he was defeated at the Battle of Pillenreuther Weiher, resulting in the Treaty of Bamberg (22 June 1450), which forced Albrecht to return all of the conquered territory and to recognize the independence of Nuremberg and its associated towns.

[1] In 1457, Albrecht arranged a marriage between his eldest son John, and Margaret, daughter of William III, Landgrave of Thuringia, who inherited the claims upon Hungary and Bohemia of her mother, a granddaughter of Emperor Sigismund.

The attempt to secure these thrones for the Hohenzollerns through this marriage failed, and a similar fate befell Albrecht's efforts to revive in his own favour the disused title of duke of Franconia.

[1] The sharp dissensions which existed among the princes over the question of reform culminated in the Bavarian War from 1459 to 1463, when Albrecht was confronted with a league under the leadership of Elector Palatine Frederick I and his Wittelsbach cousin Duke Louis IX of Bavaria-Landshut.

Under these circumstances Albrecht 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.