After 1945 eastern part of Pomerania according to agreement signed in Potsdam in 1945 by United Kingdom, United States of America and Soviet Union was given under the administration of Poland. There was never any peace treaty ,but Willy Brandt and Helmut Kohl signed bilateral agreements with Poland according to which Germany recognizes the de facto current factual reality of the Oder/Neisse? Line . Germany refrains from using military force to change the situation.
These agreements do not affect any de jure agreements.
The western part of Pomerania remained a part of the German Bundesland Mecklenburg-Vorpommern .