Columbia subject headings:
Harvard subject headings:
Edward I, King of England, 1239-1307.
Great Britain--History, Military--1066-1485.
Great Britain--History--Edward I, 1272-1307
Wales--History--1063-1536
Princeton subject headings:
Edward I, King of England, 1239-1307--Military leadership.
Wales--History, Military.
Wales--History--1063-1284.