Axis soldiers captured by the Soviet Union got on alright. The Soviet Union and Germany took about the same number of prisoners during the war, but 90% of Soviet Citizens died in captivity, while 90% of German prisoners survived. about 25% of the German deaths were also from the German 6h army, that had around 100,000 soldiers captured when they surrendered at Stalingrad. nearly all of these soldiers died in captivity, but it wasn't primary because of mistreatment, but the fact they were eating basically nothing for weeks prior to surrender and were essentially walking corpses by that time. https://www.youtube.com/watch?v=occOOTk6OKY conditions in Soviet captivity were, I believe, pretty similar to regular gulag conditions for the time period, and involved forced labor like all western allies did to germans. i believe there was some allowance for prisoner self-governance, but maybe that more applied to Japanese prisoners. Many germans were sent to work in Uranium mines in Poland and Czecheslovakia, which would shape the western notion of Soviet gulags for some time(Total Resistance promises this fate to swiss prisoners of war during a hypothetical Soviet Invasion). German internment however did last longer in the soviet union than in other countries, and only completely ended in 1956.