 Cerball mac Dúnlainge joined forces with his new overking Máel Sechnaill, while Amlaíb and Ímar aligned themselves with one of Máel Sechnaill's enemies, Áed Findliath of Ailech.In 860 Máel Sechnaill and Cerball took up arms against Áed Findliath and another of the High King's principal enemies, Flann mac Conaing of Brega, defeating them (though not decisively) at Moy near Armagh.In 861 Áed and the Norsemen of Dublin jointly plundered Máel Sechnaill's territories in Mide, but Máel Sechnaill defeated them at Drumomuy near the River Feegile on the border between County Offaly and County Kildare.