 In 859 Amlaíb, Ímar and Cerball jointly attacked Máel Sechnaill and the Gallgoídil in Mide.In the same year, however, at the royal Synod of Ráith Aeda Meic Bric (Rahugh, County Westmeath, in the territory of the Cenél Fiachach), a temporary peace was made between the contending parties.Cerball submitted to the High King and his kingdom of Osraige was transferred from Munster to "Leth Cuinn", placing it under Máel Sechnaill's authority; this transfer of sovereignty was sanctioned by the king of Munster Máel Gualae mac Donngaile.