Columbia subject headings:
Soviet Union--History, Military.
World War, 1914-1918--Soviet Union.
Harvard subject headings:
Soviet Union--History, Military.
World War, 1914-1918--Campaigns--Eastern Front
World War, 1914-1918--Russia
Princeton subject headings:
Soviet Union--History, Military--20th century.
World War, 1914-1918--Soviet Union.