▁at ▁Sam ar ob riv a . ▁Val entin ian ▁then ▁sent ▁J ov inus ▁to ▁Britain ▁and ▁promoted ▁Sever us ▁to ▁mag ister ▁p edit um . ▁It ▁was ▁at ▁this ▁time ▁that ▁Val entin ian ▁fell ▁ill ▁and ▁a ▁battle ▁for ▁succession ▁broke ▁out ▁between ▁Sever us , ▁a ▁representative ▁of ▁the ▁army , ▁and ▁R ust icus ▁Julian us , ▁mag ister ▁mem oria e ▁and ▁a ▁representative ▁of ▁the ▁Gall ic ▁nob ility . ▁Val entin ian ▁soon ▁recovered ▁however ▁and ▁appointed ▁his ▁son ▁Gr at ian ▁as ▁his ▁co - August us ▁in ▁the ▁west . ▁Am m ian us ▁remarks ▁that ▁such ▁an ▁action ▁was ▁un pre ced ented . ▁J ov inus ▁quickly ▁returned ▁saying ▁that ▁he ▁needed ▁more ▁men ▁to ▁take ▁care ▁of ▁the ▁situation . ▁In ▁ 3 6 8 ▁Val entin ian ▁appointed ▁The odos ius ▁as ▁the ▁new ▁Com es ▁Britann iar um ▁with ▁instructions ▁to ▁return ▁Britain ▁to ▁Roman ▁rule . ▁Meanwhile , ▁Sever us ▁and ▁J ov inus ▁were ▁to ▁accomp any ▁the ▁em peror ▁on ▁his ▁campaign ▁against ▁the ▁Al am anni . ▁ ▁The odos ius ▁arrived ▁in ▁ 3 6 8 ▁with ▁the ▁Bat avi , ▁Her uli , ▁J ov ii ▁and ▁Vict ores ▁leg ions . ▁Land ing ▁at ▁R ut up i æ , ▁he ▁proceeded ▁to ▁Lond in ium ▁rest oring ▁order ▁to ▁southern ▁Britain . ▁Later , ▁he ▁r al lied ▁the ▁remaining ▁g arrison ▁which ▁was ▁originally ▁station ed ▁in ▁Britain