Columbia subject headings:
Europe--History, Military.
Military art and science--Europe--History--16th century.
Military art and science--Europe--History--17th century.
Military art and science--Europe--History--To 1500.
Peace.
War and society--Europe--Congresses.
Harvard subject headings:
Europe--History, Military.
Military art and science--Europe--History--16th century.
Military art and science--Europe--History--17th century
Military art and science--Europe--History--To 1500.
Peace
War and society--Europe--Congresses.
Princeton subject headings:
Military art and science--History--Congresses.
Peace--History--Congresses.
War--History--Congresses.