 The perpetrators of these attacks are not named, but the Norsemen of Dublin were probably behind both of them.In 857 the conflict shifted to Munster, where Amlaíb and Ímar defeated Caittil Find and the Gallgoídil.The following year Ímar and Cerball mac Dúnlainge defeated the Cenél Fiachach and the Gallgoídil at Ara Tíre.