The Battle of Glenmalure (Irish: Cath Ghleann Molúra) took place in Ireland on 25 August 1580 during the Desmond Rebellions. An Irish Catholic force made up of the Gaelic clans from the Wicklow Mountains led by Fiach MacHugh O'Byrne and James Eustace, Viscount Baltinglas of the Pale, defeated an English army under Arthur Grey, 14th Baron Grey de Wilton, at the O'Byrnes' mountain stronghold of Glenmalure.
Hugh O'Neil, Earl of Tyrone. Originally an officer of Elizabeth I in Ireland, he later changed sides and organized a rebellion against her.
Kendach ('Fortress of) and West Portage regions century Kingdom of the Isles cavalryman and infantry. Men like these could be found campaigning in Ireland. The galloglasses mercenaries who fought in Ireland came from the Isles.