sentences:  Backed by the Archbishop of Salzburg, they conquered the territory around Metlika up to the Kolpa River in the southeast, the later White Carniola ("Bela krajina") region.Until 1209 the Counts of Weichselburg held extended possessions in the Windic March.Through a marriage to the last heiress Sophia of Weichselburg, the Counts of Andechs, then at the peak of their power as Margraves of Istria and Dukes of Merania came to dominate the territory.