The Battle of Glenmalure.

25th August 1580.

Other Irish Battles

Glenmalure (Irish: Gleann Molúra)

Glenmalure in the Wcklow Mountains contained the stronghold of the Gabhail Raghnal branch of the O'Byrne clan at Balinacor.

It was the site of the Battle of Glenmalure in 1580, when an English force unsuccessfully tried to take Balinacor, home of the rebel chieftain Fiach MacHugh O'Byrne.

It was the worst defeat by an English army in Ireland up to that time, they were completely routed with losses of between 500–1,000 officers and men, including Sir Peter Carew.

A boulder near the Military Road crossroads is carved with an inscription commemorating Fiach MacHugh on one side and Michael Dwyer on the other side.

Glenmaluere can be reached by the Military Road from Laragh which joins the valley at Glenmalure


Ireland in the 16th century was only partly under the control of the British.

The clan structure was still very strong and still capable of taking on and inflicting costly defeats on British forces.

In 1580, Arthur Grey, Baron Grey de Wilton was appointed Lord Deputy of Ireland.

The British were preoccupied at this time with of the growing threat posed by Spain, a threat that would eventually lead to the Spanish Armada.

Queen Elizabeth feared the Spanish might use Ireland as a springboard to launch an attack with the help of Irish rebels. Grey was instructed to make Ireland more secure for the British to prevent any collaboration with Spain.

To do this, Grey knew he would have to send troops to across the country and out of the relatively safe area around Dublin, the area known as the Pale.
Grey wanted to prevent attacks by the O’Byrnes

Fiach and his O’Byrne clan had fought in several battles against the British when Grey arrived.

Grey wanted to take control of the O’Byrne stronghold areas in the Wicklow Mountains and beyond.

This would enable British troops to march south to quell problem areas without fear of being attacked from behind by the O’Byrnes.
Fiach supported the Baltinglass Revolt

Viscount Baltinglass was at this time involved in a rebellion against the Crown with the support of Fiach and the O’Byrnes.

In 1580, Grey decided to lead his troops into the Wicklow Mountains to deal with Fiach once and for all. Some of his army veterans were unhappy about having to fight in such dangerous terrain but Grey pressed on.

The British troops were highly conspicuous in their red and blue coats.

The Irish were able to pick them off with sniper gunfire before engaging them in hand to hand combat.

Grey’s troops were routed. Fiach and the O’Byrnes had secured a famous victory.

The Battle of Glenmalure was probably the finest hour of Fiach MacHugh O’Byrne, the hero of Follow Me Up to Carlow by Irish songwriter P J McCall.