The Battle of Farsetmore was fought near Letterkenny in County Donegal on 8 May 1567, between the O’Neill and O’Donnell Túath. Shane O’Neill, chief of the O’Neills of Tír Eoghain, was defeated by Aodh mac Maghnusa Ó Domhnaill (Hugh O’Donnell) and the O’Donnells freed themselves from O’Neill aspirations of ruling Ulster as its King.
