Columbia subject headings:
World War, 1914-1918--Battlefields--Belgium--History.
World War, 1914-1918--Battlefields--France--History.
World War, 1914-1918--Campaigns--Western Front.
Harvard subject headings:
World War, 1914-1918--Battlefields--Belgium--History.
World War, 1914-1918--Battlefields--France--History.
World War, 1914-1918--Campaigns--Western Front
Princeton subject headings:
World War, 1914-1918--Campaigns--Western Front.