Columbia subject headings:
Harvard subject headings:
Brittany (France)--History, Military.
Brittany (France)--History.
Marne, 1st Battle of the, France, 1914.
World War, 1914-1918--France--Brittany.
Princeton subject headings:
Brittany (France)--History.
World War, 1914-1918--France--Brittany.