What kind of violent rule did Germany carry out in Poland?

In order to make "living space" for the Germans, the German fascists forcibly relocated 700,000 people from western Poland. Frank, the Governor-General of Poland, declared: The concept of "Poland" must be eliminated forever. In the Polish territory that was annexed to Germany, Germany expelled local residents while limiting population growth, forcing Poles to undergo sterilization surgeries, and taking large numbers of children to Germany to change their names in order to educate them in the Germanic spirit and ingrain Nazi ideas into them. The idea is that Poles are not even allowed to call themselves Poles, and they are only allowed to use ancient tribal names, such as "Kashubians", "Masurians" and so on. In the Reichstag, Germany also systematically eliminated the Polish population, especially intellectuals. For example, in the spring and summer of 1940, Germany conducted an "AB operation" ("Special Appeasement Operation") here, killing 3,500 Polish scientists and people in the cultural and artistic circles, and closed universities and middle schools.