User blog comment:0RedEye/Racial Key Critique 1: Europeans/@comment-34650195-20180811181838

Cossacks are not an ethnos, they are a warrior culture like Samurai, Beduins or Mandalorians. They are mostly  ethnical Russians. The blue-yellow-red represents only the Don cossacks, other cossacks use other flags. Particulary nearby Kuban cossack use blue-pink-green flags. If we speak about a common cossack flag, this is the closest thing there is: https://en.wikipedia.org/wiki/File:%D0%A4%D0%BB%D0%B0%D0%B3_%D1%80%D0%B5%D0%B5%D1%81%D1%82%D1%80%D0%BE%D0%B2%D0%BE%D0%B3%D0%BE_%D0%BA%D0%B0%D0%B7%D0%B0%D1%87%D0%B5%D1%81%D1%82%D0%B2%D0%B0_%D0%A0%D0%BE%D1%81%D1%81%D0%B8%D0%B8.png