Reichsacht
In 1492 he followed his father in the campaign of the Hohenzollern margrave Frederick I of Brandenburg-Ansbach, authorized to execute the Imperial ban against Duke Albert IV of Bavaria. As Albert gave in, the expedition was cancelled. Frundsberg fought for the Habsburg emperor Maximilian I against the Swiss Confederacy in the Swabian War of 1499, where he had to realize that the era of the heavy armoured knights was well and truly over. In the same year he was among the Imperial troops sent to the aid of Ludovico Sforza, who had been deposed as Duke of Milan by King Louis XII of France. When Maximilian appointed him Tyrolean military captain, he recruited a powerful army of pike square infantry formations following the Swiss example.