Yes, Many Russian Cossacks Actually Did Fight for the Nazis
The poorly-treated ethnic minority did not like Stalin. Key point: Many were unhappy enough with Soviet rule that they went to the otherside. However, most of them would meet a gruelsome fate. Between 1944 and 1947, over two million Russians who had been living in the occupied countries of Europe, some voluntarily, some not, were forcibly repatriated to the Soviet Union. Many met death by execution immediately, while others were literally worked to death in the hundreds of gulags that dotted the largest slave society in history. Whether these individuals were civilian or soldier, Soviet Prem...
Source: nationalinterest.org