The
bandon was the basic military and territorial administrative unit of the middle
Byzantine Empire. Its name, like the
Latin bandus and
bandum ("ensign,
banner"), had a
Germanic origin. It derived from the
Gothic bandwo, which is the witness of foreign influence in the army at the time this type of unit evolved. The term was used already in the 6th century, mentioned by
Procopius, as a term for a battle standard, and soon came to be applied to the unit bearing such a standard itself. Since the time of ruling
Nikephoros I (802–811) it was the name for a subdistrict of the Byzantine
thema.