Columbia subject headings:
Conflict management--Europe--History.
Europe--History, Military.
Europe--History.
Europe--Politics and government.
European cooperation--History.
Peace movements--Europe--History.
Peace treaties--Europe--History.
Peace-building--Europe--History.
Harvard subject headings:
Europe--History, Military.
Europe--History.
Peace--History
Peace--Political aspects--History.
Princeton subject headings:
Conflict management--Europe--History.
Europe--History, Military.
Europe--History.
Europe--Politics and government.
European cooperation--History.
Peace movements--Europe--History.
Peace treaties--Europe--History.
Peace-building--Europe--History.