A Polish language (literacy test) was given to all German citizens living East of the Oder-Nassar line. Any person who could not pass the POLISH LANGUAGE TESTS were promptly deported to Germany by the Polish Government as per instructions enumerated (written into the Potsdam peace treaty). Those deported were of mostly Protestant(GERMAN-LUTHERAN stock). However a few Austrian Catholics with German Surnames were reclassified as ethnically Polish and not expelled!
There were People with Polish surnames who's ancestors had immigrated to Germany in the 18th and 19th centuries. Many of these peoples were Germanized and no longer spoke Polish. As a result the Polish Government did not consider these people to be ethnically Polish. They were also expelled to Germany by the Polish Government.

At the end of the War Russia took eastern territories from Poland. These Eastern Lands were a part of (Jagellian Poland) land that Poland acquired in a non-military fashion during 15th century from Lithuania after the Marriage of the Polish Queen and the Lithuanian King.
Lithuania previously in the 13th century by military force seized these territories from Russia. Lithuania was able to seize these territories by military force because Russia was De-Militarized another words in a weakened military state after several Mongolian invasions she received between the 13th and 15th centuries.

In 1596 Poland made an attempt to Polanize her newly acquired Russian Orthodox Subjects At that time Polands' Roman Catholic Bishops invited All Russian Orthodox Bishops residing within the Boundaries of her Empire and to some outside them deep inside Russia to enter into a Full Communion with Catholic Church. As a result Poland started to interfer with Russia's political affairs.

A Polish language (literacy test) was given to all German citizens living East of the Oder-Nassar line. Any person who could not pass the POLISH LANGUAGE TESTS were promptly deported to Germany by the Polish Government as per instructions enumerated (written into the Potsdam peace treaty). Those deported were of mostly Protestant(GERMAN-LUTHERAN stock). However a few Austrian Catholics with German Surnames were reclassified as ethnically Polish and not expelled!
There were People with Polish surnames who's ancestors had immigrated to Germany in the 18th and 19th centuries. Many of these peoples were Germanized and no longer spoke Polish. As a result the Polish Government did not consider these people to be ethnically Polish. They were also expelled to Germany by the Polish Government.

Explusion of the Germans after WW2 was a complex affair that differed from each German National's indiviual situation. And or country the Germans in question were residing at the end of the War. Three situations that determined the explusion of a German National from a nation claiming Victory over Germany were First whether the German expellees were recent immigrant colonists to the country expelling them or second if the German Nationals and their ancestors were born in and had legal citizenship in the country attempting to expell them. And Third if a territorial zone or Boundary line of Germany was shifted into another nation thus making the German people living in the territory non-citizens ,foreigners or illegal residents of the nations claiming this former German territory. First we will study what influenced Poland's territorial claim against Germany and the Oder-Nasser line. In order to understand what influenced Poland territorial Claim against Germany we will have to understand the History of Poland as well as some History of her surrounding neighbors.

At the end of WW2 Stalin took East Poland and gave it to the Ukraine. In exchange Stalin gave Poland parts of East Germany up to the Oder and Nasser rivers. First the German territory had belonged to Poland and Slavic tribes in the Middle ages. For the most part over 50% percent of Germany had belonged to Slavic tribes in the Dark ages before Charlemaign and his sucessors conquered the area and attempted to Germanize the Slavic peoples between 700 A.D. to 900 A.D. Full Germanization of Germany did not take place until the 17th century. And Polish Immigration to Germany in the 18th and 19th centuries delayed full Germanization up until the rise of Nazism.

Second The territory in Eastern Poland was part of (Jagellian Poland) land that Poland acquired after the Marriage of Jadwega the Polish Queen and the Jodgello the Lithuanian King in the 15th century. Lithuania seized these territories by military force from Russia in the 13th century. Lithuania was able to seize these territories because Russia was De-Militarized and in a weakened military situation after a few Mongolian invasions of Russia that happened between the 13th and 15th centuries.

In 1596 Poland made an attempt to Polanize her newly acquired Russian Orthodox Subjects with the Treaty of Brest-Litovsk. At that time Polands' Roman Catholic Bishops invited All Russian Orthodox Bishops residing within the Boundaries of her Empire and to those residing deep inside Russia to enter into a Full Communion with Catholic Church. An attempt at temporary Communion between Catholics and Orthodox had occured in the 15th century.

As a result Poland started to interfer with Russia's sovereignty. Poles and Jews tried to move to Russia attempted to meddle in Russian Politics.

A Polish language (literacy test) was given to all German citizens living East of the Oder-Nassar line. Any person who could not pass the POLISH LANGUAGE TESTS were promptly deported to Germany by the Polish Government as per instructions enumerated (written into the Potsdam peace treaty). Those deported were of mostly Protestant(GERMAN-LUTHERAN stock). However a few Austrian Catholics with German Surnames were reclassified as ethnically Polish and not expelled!
There were People with Polish surnames who's ancestors had immigrated to Germany in the 18th and 19th centuries. Many of these peoples were Germanized and no longer spoke Polish. As a result the Polish Government did not consider these people to be ethnically Polish. They were also expelled to Germany by the Polish Government.