
Arrière-ban, in French customs, is a general proclamation whereby the king summons to war all his vassals and their vassals. To the Provost of Paris belongs the convoking and commanding of the arrière-ban. In the Medieval usage, arrière-ban denoted a general levy, where all able-bodied males were summoned into arms. The arrière-ban was proclai...
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http://en.wikipedia.org/wiki/Arrière-ban

• (n.) 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.
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http://thinkexist.com/dictionary/meaning/arriere-ban/
Ar·riere'-ban` noun [ French, from Middle English
arban ,
heriban , from Old High German
hariban ,
heriban , German
heerbann , the calling together of an army; Old High German
heri an army +
ban a public call or order. The French have misunderstood th...
Found on
http://www.encyclo.co.uk/webster/A/124

a group of vassals who owed military service, esp. to French kings. · the summoning by a medieval ruler of all vassals and free men for military service.
Found on
https://www.infoplease.com/dictionary/arriere-ban
No exact match found.