Elbrus is the highest mountain of Russia and Europe (5642 m above sea level). It's hard to breathe on its top, you don't gasp but it's just hard to work or do anything (as if you've just run up on the tenth floor). One has to acclimatize first. There are some shelters for
acclimatization on the mountain, but around are only snow and stones. So it's better to walk somewhere near the mountain first. If you try to do it without training, mountain sickness is guaranteed: severe headache, vomiting, and in the worst case - pulmonary or brain edema.
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.