Battle of Glenmalure


The Battle of Glenmalure 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.

Background

Grey had landed in Ireland with reinforcements from England to put down the rebellion. His strategy was to meet O'Byrne's threat to the English heartland of Dublin and the Pale by attacking through the highlands to the south of the city. Against the advice of veteran commanders, he chose to lead his army through lowland Kildare and into the Wicklow Mountains, with the aim of taking the fastness at Balinacor in the Glenmalure Valley.

Battle

While climbing the steep slopes of the valley, the inexperienced English soldiers were ambushed by the Irish who hid in the woods. The English were sniped at for a long period of time before their discipline collapsed and they turned and fled down the valley. It was at this point that most of their casualties occurred, as the Irish left their cover and fell upon the English with swords, spears, and axes. Hundreds of English soldiers were cut down by the pursuing Irish as they tried to escape the field. The remaining English had to fight a rearguard action for several miles until they reached the town of Rathdrum.

Aftermath

Irish sources state that around 800 English soldiers were killed, though the English put their losses at 360 dead. Among those killed was Peter Carew, cousin of his namesake colonist who had made claims to, and won, large tracts of land in southern Ireland. The remainder of the English force retreated to lowland Wicklow and from there to Dublin. However, the following year, when offered terms, most of the Irish soldiers, including O'Byrne, came in and surrendered. The exception was Baltinglass, who fled for France.
The battle is commemorated in the folk song "Follow me up to Carlow".