The Northern Clans’ Battle of Knockavoe and Knochdow
Most of the fighting, however, that took place in the north was not against the foreign element. O’Neills and O’Donnells fought amongst themselves, against each other, and against their neighbours. Wars of succession frequently rent both great families, eventually resulting in the family of Eoghan retaining the headship of the Cineal Eoghain in Conn Mdr and his son, Conn Bacach, and in Aodh Ruadh O’Donnell, and his son, Aodh Dubh O’Donnel, being successively chiefs of the Cineal Chonaill. Both families still maintained their claims to supremacy over all the north.
Those of the O’Neills were opposed in Ulaidh not only by Mac Guinness, but by the O’Neills of the Clann Aodha Buidhe, who fought their kinsmen as fiercely as ever did any of the clans of Ulaidh.
The O’Donnells were at the same time engaged in asserting their traditional rights in Cairbre and ” Lower Connacht”140) against O’Connor Sligo.