▁had ▁led ▁twelve ▁thousand ▁men ▁to ▁establish ▁a ▁military ▁presence ▁in ▁Bour ges ▁in ▁central ▁Ga ul , ▁but ▁was ▁bet rayed ▁by ▁Ar v and us , ▁the ▁Pra et or ian ▁Pref ect ▁of ▁Ga ul , ▁and ▁subsequently ▁amb ushed ▁by ▁Eur ic ' s ▁army . ▁After ▁a ▁long ▁battle , ▁the ▁Arm or ican ▁surv iv ors ▁escaped ▁to ▁Av all on ▁in ▁Burg und y , ▁after ▁which ▁they ▁are ▁lost ▁to ▁history . ▁ ▁According ▁to ▁Bre ton ▁king - lists , ▁Ri oth am ▁surv ived ▁and ▁re igned ▁as ▁Prince ▁of ▁Dom non ia ▁until ▁his ▁death ▁som etime ▁between ▁ 5 0 0 ▁and ▁ 5 2 0 , ▁though ▁this ▁may ▁have ▁been ▁a ▁different ▁person . ▁ ▁Middle ▁A ges ▁ ▁At ▁the ▁beginning ▁of ▁the ▁medieval ▁era , ▁Brit t any ▁was ▁divided ▁between ▁three ▁kingdom s , ▁Dom none a , ▁Corn ou aille ▁and ▁Bro ë rec . ▁These ▁real ms ▁eventually ▁merged ▁into ▁a ▁single ▁state ▁during ▁the ▁ 9 th ▁century . ▁The ▁un ification ▁of ▁Brit t any ▁was ▁carried ▁out ▁by ▁Nom ino e , ▁king ▁between ▁ 8 4 5 ▁and ▁ 8 5 1 ▁and ▁considered ▁as ▁the ▁Bre ton ▁P ater ▁Pat ria e . ▁His ▁son ▁Er is po e ▁secured ▁the ▁independence ▁of ▁the ▁new ▁kingdom ▁of ▁Brit t any ▁and ▁won ▁the ▁Battle ▁of ▁J eng land ▁against ▁Charles ▁the ▁Bald . ▁The ▁Bret ons ▁won ▁another ▁war