Il aura fallu que je fasse une recherche google en Anglais pour trouver une réponse :
Barbarian Tribes
-Currently in progress-
The Barbarian Tribes are divided into three different tribal factions in Total War: Rome II. Unlike the other factions, each tribe shares a bloodline with certain neighboring tribes. Through diplomacy, the barbarians can unite, forming a confederation in their area.
Gallic Confederation
Arverni Tribe
Britannic Confederation
Iceni Tribe
Germanic Confederation
Suebi Tribe
Pour les prochains qui se poseront la question..