Columbia subject headings:
Africa--History, Military.
Crusades--13th-15th centuries.
Militarism--Religious aspects--Christianity.
Harvard subject headings:
Africa--History, Military.
Crusades--13th-15th centuries
Militarism--Religious aspects--Christianity
Princeton subject headings:
Africa--History, Military.
Crusades--13th-15th centuries.
Militarism--Religious aspects--Christianity.