And that's not evening counting the USSR's millions "resettled" in ethic operations, with about a 20%-25% death rate.
https://en.wikipedia.org/wiki/Population_transfer_in_the_Sov...
And then we have the epic years in the 1920's of famine from screwing up the agricultural system, and selectively choosing ethic groups to take food from, the dwarf the famine deaths under the czars.