Columbia subject headings:
Italy--History, Military.
Italy--Social conditions--1268-1559.
Siena (Italy)--History, Military.
Siena (Italy)--Social conditions.
Harvard subject headings:
Italy--History, Military--1268-1559.
Italy--History, Military.
Italy--Social conditions--1268-1559.
Siena (Italy)--History, Military.
Siena (Italy)--Social conditions.
Princeton subject headings:
Italians--Warfare--History.
Italy--History, Military.
Militarism--Italy--History.
Militarism--Italy--Religious aspects--Christianity--History.