▁son ▁of ▁the ▁retired ▁em peror ▁Maxim ian , ▁and ▁proc laimed ▁him ▁their ▁em peror ▁on ▁ 2 8 ▁October ▁ 3 0 6 . ▁By ▁ 3 1 2 , ▁however , ▁Const antine ▁the ▁Great ▁march ed ▁on ▁Rome ▁with ▁an ▁army ▁in ▁order ▁to ▁eliminate ▁Max ent ius ▁and ▁gain ▁control ▁of ▁the ▁Western ▁Roman ▁Empire , ▁resulting ▁in ▁the ▁Battle ▁of ▁the ▁Mil v ian ▁Bridge . ▁Ult imately , ▁Const antine ' s ▁army ▁achieved ▁a ▁decis ive ▁victory ▁against ▁the ▁Pra et ori ans , ▁whose ▁em peror ▁was ▁killed ▁during ▁the ▁fighting . ▁With ▁the ▁death ▁of ▁Max ent ius , ▁Const antine ▁definit ively ▁dis band ed ▁the ▁rem n ants ▁of ▁the ▁Pra et or ian ▁Guard . ▁The ▁remaining ▁soldiers ▁were ▁sent ▁out ▁to ▁various ▁corners ▁of ▁the ▁emp ire , ▁and ▁the ▁Cast ra ▁Pra et oria ▁was ▁dis m ant led ▁in ▁a ▁grand ▁gesture ▁inaugur ating ▁a ▁new ▁age ▁in ▁Roman ▁history ▁and ▁ending ▁that ▁of ▁the ▁Pra et ori ans . ▁ ▁Part icip ation ▁in ▁wars ▁ ▁While ▁campaign ing , ▁the ▁Pra et ori ans ▁were ▁the ▁equal ▁of ▁any ▁formation ▁in ▁the ▁Roman ▁army . ▁On ▁the ▁death ▁of ▁August us ▁in ▁ 1 4 ▁AD , ▁his ▁successor , ▁T iber ius , ▁was ▁faced ▁with ▁mut in ies ▁among ▁both ▁the ▁Rh ine ▁and ▁P annon ian ▁leg ions . ▁According ▁to ▁T ac it us , ▁the ▁P annon ian ▁forces ▁were