 In order to safeguard the peace of the land and against the expansive territorial policy of the Wittelsbachs, numerous affected empire-related states of Swabia joined in 1488 on Frederick's initiative for the Swabian League.After the royal election Frederick accompanied his son to Aachen, where Maximilian was crowned on 9 April 1486.The marriage of his daughter Kunigunde to Albert IV, Duke of Bavaria, was another result of intrigues and deception, but must be counted as a defeat for Frederick.