The development of Zwiesel was frequently hampered by wars and epidemic plagues. I.e. the area was destroyed in 1431 by the Hussites, in 1468 during the Böckler war and in 1633 by the Swedish army during the Thirty Years' War. In 1741 it was invaded by the Pandurs and in 1809 there was a great battle at the Landwehrbergl against a horde of Bohemian plunderers.