Don cossacks fighting for the Red army during the Russian civil war.
Ivan Vasilievitch Boldirev (Иван Васильевич Болдырев) (1849/50 – 1898) - National Library of Russia, Saint-Petersburg, Russia, Public Domain, Don Cossack women wearing coubilyaks (кубиляках), traditional clothing worn for feasts, c. 1875-76.