[ad_1] noun, plural ar·ri·ère-bans [ar-ee-er-banz; French a ryer–bahn] /ˈær iˌɛrˈbænz; French a ryɛrˈbɑ̃/.
- a group of vassals who owed military service, especially to French kings.
- the summoning by a medieval ruler of all vassals and free men for military service.
- (in medieval France) a summons to the king’s vassals to do military service
- the vassals so assembled for military service