After a series of conflicts, the Brandenburgian margraves and the Pomeranian dukes partitioned the Uckermark with the Treaty of Prenzlau (1448).
The northern parts were to be inherited by Brandenburg in case the House of Pomerania were to become extinct.
[2][3] War started again when Stettin (Szczecin) refused to hail the Brandenburgian margraves, which it was supposed to following the Treaty of Soldin (1466).
Brandenburg responded by attacking the Pomeranian duchy and advanced deep into Pomerania-Stettin, which before the war included the Uckermark.
Based on the terms of the accord, the dukes Eric II and Wartislaw X surrendered the Duchy of Pomerania-Stettin to Albert III, with the Uckermark becoming an integral part of Brandenburg and the remainder of Pomerania-Stettin becoming a Brandenburgian vassal.