Since Russia's imperial era prior to the Russian Revolution, the Soviet Union operated concentration camps in more than 500 locations across the country and is said to have sent tens of millions of people to the camps.
Above all, Siberia was a place of exile where political offenders and the like were sent. After the Second World War, prisoners of war from the Axis powers of Hungary, Romania, Bulgaria, Finland, Japan, and Germany were accommodated here and forced to do manual labor. The number of people subjected to this is believed to be two million or more.
Wooded regions account for most of the land in Siberia. Permafrost is extensive, snow falls in August in some areas, and in cold regions the temperature is said to drop below -70 degrees Centigrade.