Vast groups of Cossacks can now be found in the south of Russia and numerous Cossack groups inhabit the northwestern Caucasus, Kuban, Krasnodar and Stavropol regions. Russian Imperial Duma Russia entered the 20th century as the only major European power without a parliament.ossacks also accepted Tatars, Germans, Turks and other nationalities into their communities, but there was one condition – they had to believe in Christ. Once accepted into the community, they stopped being Germans, Russians or Ukrainians – they became Cossacks.