Recovered or Regained Territories (, literally "Regained Lands") was an official term used by the People's Republic of Poland to describe the territory of the former Free City of Danzig and the parts of pre-war Germany that became part of Poland after World War II. The rationale for the term "Recovered" was the Piast Concept that these territories were once part of the traditional Polish homeland. They had been part of, or fiefs of, a Polish state during the medieval Piast dynasty. Over the centuries, however, they had become Germanized through the processes of German eastward settlement (Ostsiedlung) and political expansion (Drang nach Osten) and for the most part did not even contain a Polish-speaking minority.