and intermarriage, but differs in other respects due to either ancient regional West Slavic roots or Polonisation. Examples of such minorities include the Slovincians (Lebakaschuben), the Masurians and the Silesians of Upper Silesia. While in the past these people have been claimed for both Polish and German ethnicity, it really depends on their self-perception which they choose to belong to. German Poles German Poles (, ) may refer to either Poles of German descent or sometimes to Polish citizens whose ancestors held German citizenship before World War II, regardless of their ethnicity. After the flight and expulsion of Germans from Poland, the largest of a series of flights and expulsions of Germans in Europe during and after World War II, over 1 million former citizens of Germany were naturalized and granted Polish citizenship. Some of them were forced to stay in Poland, while others wanted to stay because these territories were inhabited by their families for hundreds of years. The lowest estimate by West German Schieder commission of 1953, is that 910,000 former German citizens were granted Polish citizenship by 1950. Higher estimates say that 1,043,550 or 1,165,000 were naturalized as Polish citizens by 1950. Post-WWII However, the vast majority of those people were the so-called "autochthons" who were allowed to stay in post-war Poland after declaring Polish ethnicity in a special verification process. Therefore, most of them were inhabitants of Polish descent of the pre-war border regions of Upper Silesia and Warmia-Masuria. Sometimes they were called Wasserpolnisch or Wasserpolak. Despite their ethnic background, they were allowed to reclaim their former German citizenship on application and under German Basic Law were "considered as not having been deprived of their German citizenship if they have established their domicile in Germany after May 8, 1945 and have not expressed a contrary intention." Because of this fact many of them left the People's Republic of Poland due to its undemocratic political system and economic problems. It is estimated that, in the Cold War era, hundreds of thousands of Polish citizens decided to emigrate to West Germany and, to a lesser extent, to East Germany. Despite that, hundreds or tens of thousands of former German citizens remained in Poland. Some of them created families with other Poles, who, in the vast majority, were settlers from central Poland or were resettled from the former eastern territories of Poland by the Soviets to the Recovered Territories