Still serving Maximilian, he took part in the 1504 War of the Succession of Landshut, fighting against Count Ruprecht of the Palatinate and his father Elector Palatine Philip. Frundsberg distinguished himself leading a Landsknecht regiment into the decisive Battle of Wenzenbach, whereafter Maximilian I personally bestowed knighthood on him: armed with muskets and culverines, the Frundsberg regiment broke a breach into the wagon-wall of the Bohemian mercenaries (composed 300+ wagons), which were then routed. Convinced of the necessity of a native body of trained infantry, Frundsberg assisted Maximilian in the organization of the Landsknecht troops. One year later, he became the commander of the Landsknechts in the Habsburg Netherlands.