Columbia subject headings:
Europe--Relations--Germany.
Germany--Politics and government--15th century.
Germany--Politics and government--16th century.
Germany--Politics and government--17th century.
Germany--Politics and government--18th century.
Germany--Relations--Europe.
National security--Germany.
Security, International--Europe.
Harvard subject headings:
Conflict management--Europe--History.
Conflict management--Germany--History.
Europe--History--1492-1648.
Holy Roman Empire--History.
Peace-building--Europe--History.
Peace-building--Germany--History.
Peacekeeping forces, European--History.
Peacekeeping forces, German--History.
Princeton subject headings:
Conflict management--Europe--History.
Conflict management--Germany--History.
Europe--History--1492-1648.
Holy Roman Empire--History.
Peace-building--Europe--History.
Peace-building--Germany--History.
Peacekeeping forces, European--History.
Peacekeeping forces, German--History.