▁He ▁is ▁also ▁known ▁as ▁Urs ell us ▁de ▁Ball ione ▁in ▁Latin ▁or ▁Ros cel in ▁or ▁Ros kel in ▁de ▁Ba ie ul , ▁and ▁Anna ▁Com n ena ▁called ▁him ▁O urs el ios , ▁also ▁rendered ▁Urs el ius . ▁ ▁R ous sel ▁was ▁possibly ▁a ▁Frank , ▁but ▁certainly ▁vent ured ▁with ▁the ▁Ap ul ian ▁Norm ans ▁to ▁Italy , ▁settled ▁in ▁Terra ▁d ' O tr anto ▁and ▁served ▁under ▁Roger ▁de ▁Ha ute ville ▁in ▁Sic ily . ▁According ▁to ▁Geoff rey ▁Mal aterra , ▁R ous sel ▁distinguished ▁himself ▁with ▁his ▁bra very ▁at ▁the ▁Battle ▁of ▁Cer ami , ▁where ▁he ▁ur ged ▁Count ▁Roger ▁to ▁purs ue ▁the ▁fle eing ▁Sar ac ens . ▁As ide ▁from ▁this ▁brief ▁account ▁by ▁Mal aterra , ▁The ▁Alex i ad ▁of ▁Anna ▁Com n ena ▁is ▁the ▁main ▁source ▁for ▁R ous sel . ▁ ▁He ▁was ▁present ▁at ▁the ▁Camp aign ▁of ▁Man zik ert ▁in ▁ 1 0 7 1 , ▁but ▁did ▁not ▁particip ate ▁in ▁the ▁battle , ▁as ▁he ▁was ▁previously ▁dispatch ed ▁by ▁the ▁Emperor ▁Di ogen es ▁to ▁Kh li at ▁to ▁for age ▁and ▁pl under . ▁After ▁the ▁dis aster , ▁he ▁was ▁kept ▁in ▁imperial ▁service , ▁where ▁good ▁gener als ▁were ▁needed , ▁and ▁was ▁sent ▁into ▁Asia ▁Minor ▁again ▁with ▁a ▁force ▁of ▁ 3 , 0 0 0 ▁Franco - N orm an ▁heavy ▁caval ry . ▁There ▁R ous