Columbia subject headings:
Harvard subject headings:
France--History
France--Relations--Germany
Fraternization--France--History.
Fraternization--Germany--History.
Germany--History
Germany--Relations--France
Soldiers--France--History.
Soldiers--Germany--History.
War and society--France--History.
War and society--Germany--History.
Princeton subject headings:
France--Relations--Germany.
Fraternization--France--History.
Fraternization--Germany--History.
Germany--Relations--France.