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Beginning of the Siege of Duncannon

The siege of Duncannon begins on January 20, 1645, during the Irish Confederate Wars. An Irish Catholic Confederate army under Thomas Preston besieges and successfully takes the town of Duncannon in County Wexford from an English Parliamentarian garrison. The siege is the first conflict in Ireland in which mortars are utilized.

At the outbreak of the Irish Rebellion of 1641, most of south-eastern Ireland falls to the Catholic insurgents. Roughly 1,000 rebels blockade Duncannon, which is heavily fortified and contains an English garrison of about 300 men. Around 150 of the English troops are killed in forays against the Irish at nearby Redmond’s Hall, but without siege artillery, or expertise in siege warfare, the rebels are unable to take Duncannon.

Hostilities continue throughout 1642, as the Irish, now organised as the Irish Confederacy raid the town’s hinterland. As in much of Ireland, the conflict is bitter. In one incident, Laurence Esmonde, 1st Baron Esmonde, the Royalist commander, hangs 16 Irish prisoners who have been taken at nearby Ramsgrange. In response, the Irish execute 18 English prisoners whom they have been holding.

In 1643, because of his need for troops to fight in the English Civil War, Charles I signs a ceasefire with the Irish Confederates. As a result, hostilities between Duncannon and the Catholic-held surrounding area are suspended.

However, in 1644, the English garrison of Cork, under Murrough O’Brien, 1st Earl of Inchiquin, unhappy with the Royalist truce with the Irish Confederates, declares for the English Parliament, who are to remain hostile to Irish Catholic forces throughout the 1640s. Esmonde, under pressure from elements of his garrison, also changes to the side of Parliament and effectively re-declares war on the Catholic Confederates. His motives are unclear: though he is a Protestant convert, the Esmonde family are Anglo-Irish Roman Catholics, and he owes his entire advancement to the Crown.

Duncannon is a strategically important town for two reasons. Firstly, it has formidable defences. Secondly and more importantly, its guns overlook the sea route to Waterford and New Ross, two of the most important Catholic-held towns and also ports at which the Confederates receive military aid from Catholic Europe.

Needing to keep this channel open and also fearing the presence of an English garrison deep in their territory, the Confederates’ Supreme Council in Kilkenny despatches Thomas Preston, general of their Leinster Army, to take Duncannon in January 1645. Preston has at his disposal 1,300 men, four cannons and a mortar. The mortar, the first of its kind to be used in Ireland has been donated by Spain the previous year and is commanded by a French military engineer named Nicholas La Loue. La Loue had served with Preston in Flanders and is chief of engineering in the Leinster Army.

Duncannon possesses formidable defences. For one thing, it is located on a peninsula and can only be approached from the north, the other three sides jutting out into the sea. Just off the town are docked four Parliamentarian ships, which are supplying Duncannon with food and reinforcements. Secondly, it possesse two lines of fortifications, the outer line being a more modern low deep rampart protected by a dry ditch and the inner wall being a medieval curtain wall, complete with three towers. However, it has two grave weaknesses, first, it is overlooked by a hill to the north, from which an attacker can fire into the town and, secondly, the water supply is located outside the walls. 

Preston arrives at Duncannon on January 20 and proceeds to construct a ring of trenches which cut off Duncannon on its landward side. From the hill that overlooks the town to the north, his guns are able to fire on a squadron of four Parliamentarian ships that are docked off Duncannon and providing the town with supplies. The flagship, the Great Louis, is badly damaged, its mast wrecked by cannon fire, and it takes several more hits from the mortar as it tries to get away. The ship sinks in deep water, drowning its crew and 200 soldiers who are on board.

Having cut off Duncannon’s supply from the sea, Preston proceeds to dig saps closer to the walls, the ultimate aim being to bring his cannon close enough to the walls in order to blast a breach and open the way for an assault. His engineers also dig a mine underneath one of the town’s bastions. All the while, the town’s defenders are kept under a bombardment by the mortar and, as the Confederate troops get closer to the walls, by sharpshooters. On March 12, one such sniper kills the fort’s second in command, one Captain Lurcan, who is hit in the head by a bullet.

On March 16, by which time the Irish trenches are “within pistol shot of the walls,” Preston orders the mine to be exploded, opening a breach in Duncannon’s outer walls. The Irish infantry then assault the town, but are beaten off with some losses. The following day, Saint Patricks Day, Preston tries again and this time his troops succeed in taking the town’s outer, more modern walls but are stopped at Duncannon’s inner, medieval ramparts. They succeed in occupying one of the town’s towers for an hour before being beaten back. Geoffrey Baron, a Confederate politician, who keeps a diary of the siege, reports that 24 Irish soldiers are killed in the two assaults.

At this point, Preston summons Esmonde to surrender, before he has to “proceed to extremities.” This is a delicate threat, implying that if the town falls to an assault, its defenders will be put to the sword – as is customary in contemporary siege warfare. Esmonde is also advised to surrender by the Parliamentarian vice admiral, William Smith, who is anchored offshore with seven ships, but cannot break through to relieve the town. In a letter that reaches Esmonde on March 11, Smith warns him that “if the rebels take the fort by storming it, they will undoubtedly put you all to death…you should agree with thy adversary while thou art in the way.” Esmond has Smith’s letter publicly read to his troops after the assaults of March 16-17 to discourage those who favour holding out.

Alongside the risk of massacre, the English garrison is also very low on gunpowder and water. The town’s only source of fresh water, a well, is behind the Confederate siege lines.

In light of these facts, Esmonde formally surrenders Duncannon to Preston on March 18. The Confederates take possession of the town but its garrison is allowed to march away to Youghal, which is in Protestant hands. However, they have to leave behind the town’s 18 artillery pieces. Esmonde himself dies a feways after the end of the siege. Preston goes on to briefly besiege Youghal, but bad weather, a lack of supplies and squabbling with James Tuchet, 3rd Earl of Castlehaven, the Confederate Munster general, puts an end to his campaign for the winter. 

The siege is of importance in that it reopens the sea route into Waterford and eliminates a hostile English garrison in Confederate territory. Preston, who had for many years been the Spanish military governor of Leuven, is highly experienced in siege warfare and his conduct of the siege draws widespread praise. Not only does he take the town, but he does so at a relatively low cost. Sixty-seven Confederate soldiers die in the siege, of whom roughly 30 die of disease. Given that the campaign is conducted in mid-winter, in an age when disease routinely kills many more soldiers than combat, this represents a considerable logistical achievement on the part of the Irish general.

The Great Lewis, the Parliamentarian ship sunk during the siege, is rediscovered in 1999 and raised in 2004.

Duncannon is besieged again during the Cromwellian conquest of Ireland by the forces of the English Parliament, as part of the Siege of Waterford. It repels a siege by Oliver Cromwell in 1649 but surrenders after a lengthy blockade by Henry Ireton in 1650.


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Oliver Cromwell Abandons the First Siege of Waterford

Oliver Cromwell abandons the First Siege of Waterford on December 2, 1649, and goes into winter quarters at Dungarvan. Waterford is besieged twice during 1649 and 1650 during the Cromwellian conquest of Ireland. The town is held by Confederate Ireland, also referred to as the Irish Catholic Confederation, under General Richard Farrell and English Royalist troops under General Thomas Preston. It is besieged by English Parliamentarians under Cromwell, Michael Jones and Henry Ireton.

Waterford is a Catholic city and like most other towns in southeast Ireland, the populace has supported the Confederate Catholic cause since the Irish Rebellion of 1641. Late in 1641, Protestant refugees, displaced by the insurgents, begin to arrive in the town, creating tension among the Catholic townspeople. The city’s mayor wants to protect the refugees, but the recorder and several of the aldermen on the city council want to strip them of their property and let in the rebels, who arrive outside the walls in early 1642. At first, the Mayor’s faction is successful in refusing to admit rebel forces, but by March 1642, the faction in the municipal government sympathetic to the rebellion prevails. The Protestants in Waterford are expelled, in most cases put on ships to England, sometimes after having their property looted by the city mob. In 1645, Confederate troops under Thomas Preston besiege and capture nearby Duncannon from its English garrison, thus removing the threat to shipping coming to and from Waterford.

Waterford’s political community is noted for its intransigent Catholic politics. In 1646, a synod of Catholic Bishops, based in Waterford, excommunicate any Catholic who supports a treaty between the Confederates and English Royalists, which does not allow for the free practice of the Catholic religion. The Confederates finally agree to a treaty with Charles I of England in 1648, in order to join forces with the Royalists against their common enemy, the English Parliament, which is both anti-Catholic and hostile to the King. The Parliamentarians land a major expeditionary force in Ireland at Dublin, under Cromwell in August 1649.

The English Parliamentarian New Model Army arrives to besiege Waterford in October 1649. One of the stated aims of Cromwell’s invasion of Ireland is to punish the Irish for the mistreatment of Protestants in 1641. Given Waterford’s history of partisan Catholic politics, this provokes great fear amongst the townspeople. This fear is accentuated by the fate of Drogheda and nearby Wexford which had recently been taken and sacked by Cromwell’s forces and their garrisons massacred.

Waterford is very important strategically in the war in Ireland. Its port allows for the importation of arms and supplies from continental Europe and its geographical position commands the entrance of the rivers Suir and Barrow.

Before besieging Waterford, Cromwell has to take the surrounding garrisons held by Royalist and Confederate troops in order to secure his lines of communication and supply. Duncannon, whose fort commands the sea passage into Waterford, is besieged by Parliamentarians under Ireton from October 15 to November 5. However, due to a stubborn defence, the garrison there under Edward Wogan holds out. This means that heavy siege artillery cannot be brought up to Waterford by sea.

New Ross surrenders to Cromwell on October 19 and Carrick-on-Suir is taken on November 19. A counterattack on Carrick by Irish troops from Ulster under a Major Geoghegan is repulsed on November 24, leaving 500 of the Ulstermen dead.

Having isolated Waterford from the east and north, Cromwell arrives before the city on November 24. However, Waterford still has access to reinforcements from the west and up to 3,000 Irish soldiers from the Confederate’s Ulster Army under Richard O’Farrell are fed into the city in the course of a week. O’Farrell, having been a successful officer in the Spanish Army, is highly trained and experienced in siege warfare from battles in Flanders. Cromwell has come up against a superior minded soldier and commander. The weather is extremely cold and wet, and the Parliamentarian troops suffer heavily from disease. Out of 6,500 English Parliamentarian soldiers who besiege Waterford in 1649, only 3,000 or so are still fit by the time the siege is called off. Added to this, Cromwell is able to make little headway in taking the city. The capture of a fort at Passage East enables him to bring up siege guns by sea, but the wet weather means that it is all but impossible to transport them close enough to Waterford’s walls to use them. Farrell proves tactically superior in defending Waterford and repels Cromwell’s attempts. Eventually Cromwell has to call off the siege on December 2 and go into winter quarters at Dungarvan. Among his casualties is his commander Michael Jones, who dies of disease.