Columbia subject headings:
Europe--History--20th century.
Geopolitics--History--20th century.
World War, 1914-1918--Influence.
Harvard subject headings:
Europe--History--20th century.
Geopolitics--History--20th century.
World War, 1914-1918--Influence
Princeton subject headings:
Europe--History--20th century.
Geopolitics--History--20th century.
World War, 1914-1918--Influence.