Columbia subject headings:
Military religious orders--Europe--History--To 1500.
Tannenberg, Battle of, Poland, 1410.
Teutonic Knights--History--To 1500.
Harvard subject headings:
Military religious orders--Europe--History--To 1500.
Tannenberg, Battle of, Poland, 1410.
Teutonic Knights--History--To 1500.
Princeton subject headings: