Columbia subject headings:
Military art and science--Byzantine Empire--Handbooks, manuals, etc.
Military art and science--Handbooks, manuals, etc.
Harvard subject headings:
Military art and science--Byzantine Empire--Handbooks, manuals, etc.
Military art and science--Handbooks, manuals, etc.
Princeton subject headings:
Military art and science--Byzantine Empire--Handbooks, manuals, etc.
Military art and science--Handbooks, manuals, etc.