Columbia subject headings:
Cossacks--History, Military--Chronology.
Cossacks--History--Chronology.
Cossacks--History.
Russia--History, Military--Chronology.
Harvard subject headings:
Cossacks--History, Military--Chronology.
Cossacks--History--Chronology.
Cossacks--History.
Russia--History, Military--Chronology.
Princeton subject headings:
Cossacks--History, Military--Chronology.
Cossacks--History--Chronology.
Cossacks--History.
Russia--History, Military--Chronology.