service of a foreign nation. After Germany lost the war, the International Military Tribunal at the Nuremberg Trials and Poland's Supreme National Tribunal concluded that the aim of German policies in Poland – the extermination of Poles and Jews – had "all the characteristics of genocide in the biological meaning of this term." German People's List The German People's List (Deutsche Volksliste) classified the willing Polish citizens into four groups of people with ethnic Germanic heritage. Group 1 included so-called ethnic Germans who had taken an active part in the struggle for the Germanization of Poland. Group 2 included those ethnic Germans who had not taken such an active part, but had "preserved" their German characteristics. Group 3 included individuals of alleged German stock who had become "Polonized", but whom it was believed, could be won back to Germany. This group also included persons of non-German descent married to Germans or members of non-Polish groups who were considered desirable for their political attitude and racial characteristics. Group 4 consisted of persons of German stock who had become politically merged with the Poles. After registration in the List, individuals from Groups 1 and 2 automatically became German citizens. Those from Group 3 acquired German citizenship subject to revocation. Those from Group 4 received German citizenship through naturalization proceedings; resistance to Germanization constituted treason because "German blood must not be utilized in the interest of a foreign nation," and such people were sent to concentration camps. Persons ineligible for the List were classified as stateless, and all Poles from the occupied territory, that is from the Government General of Poland, as distinct from the incorporated territory, were classified as non-protected. Encouraging ethnic strife According to the 1931 Polish census, out of a prewar population of 35 million, 66% spoke the Polish language as their mother tongue, and most of the Polish native speakers were Roman Catholics. With regards to the remainder, 15% were Ukrainians, 8.5% Jews, 4.7% Belarusians, and 2.2% Germans. Germans intended to exploit the fact that the Second Polish Republic was an ethnically diverse territory, and their policy aimed to "divide and conquer" the ethnically diverse population of the occupied Polish territory, to prevent any unified resistance from forming. One of the attempts to divide the Polish nation was a creation of a new ethnicity called "Goralenvolk". Some minorities, like Kashubians, were forcefully enrolled of into the Deutsche Volksliste, as