The Battle of Dungan’s Hill takes place in County Meath on August 8, 1647. It is fought between the armies of Confederate Ireland and the Parliament of England during the Wars of the Three Kingdoms. The battle takes place near the modern village of Summerhill and along the present main road between Trim and Kilcock.

By 1647, The Irish Catholic Confederation controls all of Ireland except for Parliamentarian enclaves around Dublin and Cork and a Scottish outpost in Ulster. The previous year they had rejected a treaty with the English Royalists in favour of eliminating the remaining British forces in Ireland.

In August 1647, the Confederate Leinster army under Thomas Preston is attempting to take Dublin from the English Parliamentarian garrison under Michael Jones, when it is intercepted by the Roundheads and forced to give battle. Jones had marched to Trim to relieve the Parliamentarian outpost there at Trim Castle. Preston, who had been shadowing Jones’ movements, attempts to march on Dublin before Jones’ army returns there, but covers only 12 of the 40 miles before being caught at Dungan’s Hill, where the Confederate forces have to form up for battle.

From a Parliamentarian point of view, victory in this battle is presented to them by the incompetence of the Irish commander. Preston is a veteran of the Thirty Years’ War, where he had been a commander of the Spanish garrison at Leuven, but has no experience in open warfare or handling cavalry. Jones, by contrast, had been a cavalry officer in the English Civil War. As a result, Preston tries to move his cavalry along a narrow covered lane where they are trapped and subjected to enemy fire without being able to respond. Even worse, Preston has placed a large number of his troops in wheat fields over seven feet tall. As a result these troops are unable to see the Parliamentarians until it is too late. With the Confederate army spread out and in confusion, Jones’ troops fall in amongst them causing the demoralised Irish cavalry to flee the field, leaving the remainder of Preston’s infantry unsupported.

The Confederate army’s infantry are primarily equipped with pikes and heavy muskets and trained to stand in tercios in the Spanish manner. This means they are difficult to break, but also highly immobile, without cavalry to cover their cumbersome formation when it moves. What is worse, Preston has positioned them in a large walled field, so that when their cavalry has run away, the Parliamentarians can surround and trap them. Some of the Irish infantry, Scottish Highlanders brought to Ireland by Alasdair Mac Colla, manage to charge and break through Jones’ men and escape into a nearby bog, where the English cavalry could not follow. Preston and 2,000 to 3,000 of his regular infantry manage to follow the Highlanders to safety, but the remainder are trapped.

What happens next is disputed. The Irish infantry manages to hold off several assaults on their position, before trying to follow their comrades into the safety of the bog. This makes them lose their formation and the Parliamentarians get in amongst them and then surround them in the bogland. Parliamentarian accounts simply say that the Irish force is then destroyed. Irish accounts, however, claim that the Confederate troops surrender and are then massacred. One account, by a Catholic friar named O Meallain, says that the corpses of the Irish foot soldiers are found with their hands tied. A recent study suggests that the Irishmen probably tried to surrender, but that, according to the conventions of 17th century warfare, this had to be accepted before it entitled them to safety. In this case, it was not accepted and the infantrymen were butchered.

Around 3,000 Confederate troops and a small number of Parliamentarians die at Dungan’s Hill. One of the English regimental commanders, Colonel Anthony Hungerford, is shot in the mouth, a wound that invalids him out of the English Army. Most of the dead are Irish infantrymen killed in the last stage of the battle. Those prisoners who are taken are mainly officers, whom the Parliamentarians can either ransom or exchange for prisoners of their own. Richard Talbot, a junior cavalry officer but later Earl of Tyrconnell and Lord Deputy of Ireland, is among the Confederate prisoners.

In the immediate aftermath of the battle, Owen Roe O’Neill‘s Ulster Army marches through the pass of Portlester Mill to mount an effective rearguard action, routing Jones’ advanced brigade and enabling the survivors of the Leinster army to escape. Jones, fearing O’Neills army, does not continue the pursuit and returns to Dublin. O’Neill and his Ulstermen return four months later to bury the dead Confederates.