In 1469 Millstatt Abbey was dissolved and its estates passed to the Knightly Order of Saint George, established by Emperor Frederick III to protect the area against the Ottoman forces who after the Fall of Constantinople already campaigned the Balkans and the Duchy of Carniola in the south. Turkish troops broke into the region in September 1473, robbing the town and plundering the valleys. On 25 June 1478 a group of about 600 farmers tried unsuccessfully to drive them out. By 1480 the Turks left, possibly as a result of an invasion by Hungarians under King Matthias Corvinus.