In the years of WWII the Germans conducted mass deportation of the civil people from the USSR and East Europe to work in Germany. In general five million people (Poles, Russians, Ukrainians etc.) were deported this way. 2,5 million of them were from Ukraine, 1,5 million - from
Poland, 400 thousand - from Belarus. Not so many Russians because the Germans could not capture densely populated regions of Russia and big cities except for Rostov-on-Don (1942) and Voronezh (1942-43). Such people were called "Ostarbeiters" by the Germans.