Columbia subject headings:
German mercenaries--History.
Military art and science--Europe--History.
Weapons--Europe--History.
Harvard subject headings:
Armor--Europe--History.
German mercenaries--History.
Military art and science--Europe--History
Weapons--Europe--History
Princeton subject headings:
Armor--Europe--History.
German mercenaries--History.
Military art and science--Europe--History.
Weapons--Europe--History.