The duke at the time was Ulrich III, but he ruled for many years after 1259, and was probably not at the battle, where the Chronicle, which mentions that the Germans were led by the "Duke of Karentana" and implied a general feudal levy from the Frankish states of Greece, maintains that he was killed at the hand of Geoffrey of Briel
The duke at the time was Ulrich III, but he ruled for many years after 1259, and was probably not at the battle, where the Chronicle maintains that he was killed at the hand of Geoffrey of Briel, the Baron of Karytaina. The Chronicle mentions that the Germans were led by the "Duke of Karentana", usually identified with Carinthia. The Greek and French versions of the Chronicle of the Morea mention troops from Achaea, the Duchy of Athens, the Triarchy of Negroponte, and the Duchy of the Archipelago under William's command, implying a general feudal levy from the Frankish states of Greece, which were vassals of the Prince of Achaea. 
