▁em per ors ▁met ▁in ▁P ann onia . ▁The ▁en su ing ▁Battle ▁of ▁M urs a ▁Major ▁resulted ▁in ▁a ▁cost ly ▁victory ▁for ▁Constant ius . ▁Two ▁years ▁later ▁he ▁defeated ▁Magn ent ius ▁again ▁in ▁southern ▁Ga ul ▁at ▁the ▁Battle ▁of ▁M ons ▁Sele uc us . ▁Magn ent ius , ▁now ▁real izing ▁the ▁fut ility ▁of ▁continu ing ▁his ▁revol t , ▁committed ▁suic ide ▁in ▁August ▁that ▁year ; ▁making ▁Constant ius ▁sole ▁r uler ▁of ▁the ▁emp ire . ▁It ▁was ▁around ▁this ▁time ▁that ▁Constant ius ▁conf isc ated ▁Gr at ian us ' ▁property , ▁for ▁supposed ly ▁showing ▁hospital ity ▁to ▁Magn ent ius ▁when ▁he ▁was ▁in ▁P ann onia . ▁Despite ▁his ▁father ' s ▁fall ▁from ▁favor , ▁Val entin ian ▁does ▁not ▁seem ▁to ▁have ▁been ▁advers ely ▁affected ▁at ▁this ▁time , ▁making ▁it ▁unlikely ▁he ▁ever ▁fought ▁for ▁the ▁us ur per . ▁It ▁is ▁known ▁that ▁Val entin ian ▁was ▁in ▁the ▁region ▁during ▁the ▁conflict , ▁but ▁what ▁invol vement ▁he ▁had ▁in ▁the ▁war , ▁if ▁any , ▁is ▁unknown . ▁ ▁Service ▁under ▁Constant ius ▁and ▁Julian ▁The ▁conflict ▁between ▁Magn ent ius ▁and ▁Constant ius ▁had ▁allowed ▁the ▁Al am anni ▁and ▁Fran ks ▁to ▁take ▁advantage ▁of ▁the ▁confusion ▁and ▁cross ▁the ▁Rh ine , ▁attack ing ▁several ▁important ▁settlement s ▁and ▁fort ifications . ▁In ▁ 3 5 5 , ▁after ▁depos ing ▁his ▁cousin ▁Gall us ▁but