The facts that emerge from any review of the battle are that the Three Collas were victorious in the battle(s) of Achadh Leith-dheirg in "Fearn-mhagh" and that they drove the Ulaid beyond the Glen Righe. The Three Collas took from the Ulaid the land west of Glen Righe and Loch nEathach (Lough Neagh).
The facts that come to light from any examination of the conflict are that the Three Collas emerged triumphant in the battles of Achadh Leith-dheirg in "Fearn-mhagh" and that they drove the Ulaid beyond the Glen Righe. The Three Collas took from the Ulaid the territory west of Glen Righe and Loch nEathach (Lough Neagh).