Battle of Portlester

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Battle of Portlester
Part of Irish Confederate Wars
Date 7 August 1643
Result Confederate Victory
Irish Confederates Irish Government forces
Commanders and leaders
Owen Roe O'Neill Lord Moore
1,500 3,400
Casualties and losses
Light 200 dead

The Battle of Portlester took place on 7 August 1643 near the town of Ballivor, Leinster in Ireland as part of the Irish Confederate Wars. It was fought between the Ulster Army under Owen Roe O'Neill and a largely Protestant government force from Dublin under Lord Moore, with both sides proclaiming their basic loyalty to Charles I. In the battle the two armies exchanged artillery fire, during which the Protestant commander Lord Moore was killed and his army driven off giving the Confederates victory.


Following their rebellion in 1641 Irish Catholics had formed a confederation declaring their support for the King in his Civil War with the London Parliament, claiming that the authorities in Dublin had sided with the Roundheads against the King's interest in both Ireland and England. The Confederates aimed to secure concessions for the Catholic church, while many Protestant royalists regarded the Confederates as rebels who had committed a series of massacres, and at the time were as opposed to them as to the Roundheads.

During summer 1643 O'Neill's Ulster Army had moved south into Leinster following their heavy defeat at the Battle of Clones. Alongside local Confederate forces they captured a series of Protestant-garrisoned towns notably Ballybeg where they seized a large number of supplies and Protestant hostages.[1] O'Neill was supplemented by some troops from Longford under Richard O'Farell. The plundering of the area by O'Neill's forces led to intense hostility from local Catholic inhabitants against the Ulster Army which was to become a recurring feature during the war.[2]

Portlester was a small settlement in Meath, east of Ballivor and southwest of Trim, which was held by royalist Protestant forces. O'Neill's troops besieged Portlester Castle, bringing up artillery to pound the defences. The defenders eventually decided to abandon their position by escaping to safety across the nearby river.[3]


O'Neill then received intelligence that a largely Protestant force under Lord Moore was approaching from Athboy. Moore had recently been reinforced and was eager to test the strength of O'Neill's army.[4] Moore wished to prevent the Ulster Army from capturing more of the government's strongholds and to stop further damage being done to the countryside.

O'Neill's forces took up defensive positions near a ford across the river and at a nearby mill. O'Neill led some of his troops forwards until they made contact with the enemy, then withdrew hastily in an effort to draw Moore's army onto unfavourable ground. As they advanced in pursuit the Protestant troops were raked with crossfire, particularly from the mill where O'Neill had stationed musketeers. Faced with heavy fire, Moore's men withdrew. They regrouped but two further assaults were driven back.[5]

Moore then ordered a large force to attempt the mill. Heavy hand-to-hand combat took place around the position, while Moore launched further attacks on the ford. O'Neill sent in a relief column to the mill whose defenders accepted fresh ammunition but rejected the need for reinforcements and pledged to hold the position at all costs.[6] While Moore was surveying the nearby fighting at the mill, he was struck by an artillery shot that killed him. Following their commander's death the government forces broke and fled. Some of O'Neill's troops wanted to follow them, but O'Neill rejected this as he feared that the withdrawal was a ruse and wanted to conserve his forces.[7]


The following morning the Protestant army retreated towards Athboy. Although there were other government troops nearby under George Monck, they were short of numbers and marched towards Trim. O'Neill rewarded the mill's defenders with gold coins for their bravery. Although the victory brought to an end the series of defeats that the Ulster Army had suffered over the previous two years, the defensive battle at Portlester gave little advantage to the Confederates as they lacked the resources to attempt a further advance eastwards towards Dublin.

Shortly afterwards a Cesssion of Arms was agreed between the Dublin government of Ormond and the Irish Confederates as a first step towards negotiating a peace treaty and alliance against their mutual enemies the Roundhead forces in England.

The death of Moore was likely an inspiration for the part of Tyragnes in the 1645 play Cola's Furie which portrayed contemporary events in Ireland.[8]


  1. ^ Casway p.85
  2. ^ Casway p.86
  3. ^ Casway p.87
  4. ^ Casway p.86-76
  5. ^ Casway p.87
  6. ^ Casway p.87-88
  7. ^ Casway p.88
  8. ^ Randall p.92


  • Casway, Jerrold I. Owen Roe O'Neill and the Struggle for Catholic Ireland. University of Pennsylvania Press, 1984.
  • Randall, Dale. Winter Fruit: English Drama, 1642-1660. University Press of Kentucky. 1995.

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