Columbia subject headings:
Harvard subject headings:
Generals--Islamic Empire--Biography.
Islamic Empire--History, Military.
Islamic Empire--History--622-661.
Khālid ibn al-Walīd, -641 or 642.
Princeton subject headings:
Generals--Islamic Empire--Biography.
Islamic Empire--History, Military.
Islamic Empire--History--622-661.
Khālid ibn al-Walīd, -641 or 642.