In 1939 an European country invaded another European countries with goal of murdering and enslaving population living there. Years ago https://en.wikipedia.org

In 1939 an European country invaded another European countries with goal of murdering and enslaving population living there. Years ago https://en.wikipedia.org/wiki/Islamic_State_of_Iraq_and_the_Levant https://en.wikipedia.org/wiki/Islamic_State_of_Iraq_and_the_... did similar thing in Iraq. (there are many other examples, I am not going to list all of them)