Columbia subject headings:
Motion pictures--United States--History--20th century.
World War, 1914-1918--Motion pictures and the war.
Harvard subject headings:
Motion pictures--United States--History
Motion pictures--United States--History--20th century
World War, 1914-1918--Motion pictures and the war
Princeton subject headings:
Motion pictures--United States--History--20th century.
World War, 1914-1918--Motion pictures and the war.