During World War II , the Germans not only murdered Killing millions of Poles ( Jewish and otherwise ) , but ethnically cleansed Emptying millions more through forced Hostile_encounter deportation to make room for “ racially superior ” German settlers ( see Generalplan Ost and Lebensraum ) .

From the start Process_start of the war Hostile_encounter against Poland , Germany intended to realize Know Adolf Hitler 's plan Arranging , set out Creating in his book `` Mein Kampf '' , to acquire Getting `` living space '' ( `` Lebensraum '' ) in the east for massive settlement of German colonists .