▁P avia ▁at ▁the ▁end ▁of ▁the ▁year ▁ 8 8 8 . ▁ ▁He ▁was ▁formally ▁crown ed ▁King ▁of ▁Italy ▁by ▁Pope ▁Stephen ▁V ▁in ▁ 8 8 9 , ▁and ▁this ▁was ▁followed ▁by ▁his ▁coron ation ▁as ▁Roman ▁Emperor ▁on ▁ 2 1 ▁February ▁ 8 9 1 , ▁together ▁with ▁the ▁crow ning ▁of ▁his ▁son ▁Lam bert ▁II ▁as ▁King ▁of ▁Italy . ▁ ▁The ▁situation ▁in ▁Italy ▁began ▁to ▁d eter ior ate ▁with ▁the ▁election ▁of ▁a ▁new ▁po pe , ▁Form os us , ▁in ▁ 8 9 1 . ▁D istr ust ful ▁of ▁Guy , ▁he ▁began ▁to ▁look ▁elsewhere ▁for ▁support ▁against ▁the ▁em peror , ▁as ▁Guy ▁found ▁it ▁increasing ly ▁difficult ▁to ▁end ▁the ▁threat ▁of ▁Ber eng ar ▁who ▁still ▁held ▁out ▁in ▁his ▁Duch y ▁of ▁Fri uli . ▁ ▁To ▁bol ster ▁his ▁overall ▁position , ▁at ▁R aven na ▁on ▁ 3 0 ▁April ▁ 8 9 2 , ▁Guy ▁forced ▁Pope ▁Form os us ▁to ▁crown ▁Lam bert ▁as ▁co - em peror . ▁▁▁ ▁The ▁po pe ▁therefore ▁took ▁the ▁next ▁opportunity ▁to ▁opp ose ▁Guy ▁by ▁supporting ▁Arn ulf ▁of ▁Car inth ia ▁for ▁the ▁Italian ▁and ▁imperial ▁titles . ▁In ▁ 8 9 3 , ▁Form os us ▁invited ▁Arn ulf ▁to ▁come ▁to ▁Tr ento ▁to ▁over throw ▁Guy ▁and ▁be ▁crown ed ▁himself . ▁Arn ulf ▁instead ▁sent ▁his ▁son ▁Zw ent ib old ▁with ▁an ▁army ▁to ▁join