ARRIEREBAN
Ar*riere"-ban`, n. Etym: [F., fr. OE. arban, heriban, fr. OHG.
hariban, heriban, G. heerbann, the calling together of an army; OHG.
heri an army + ban a public call or order. The French have
misunderstood their old word, and have changed it into arrière-ban,
though arrière has no connection with its proper meaning. See Ban,
Abandon.]
Definition: A proclamation, as of the French kings, calling not only their
immediate feudatories, but the vassals of these feudatories, to take
the field for war; also, the body of vassals called or liable to be
called to arms, as in ancient France.
Source: Webster’s Unabridged Dictionary 1913 Edition