The Siege of Charlemont took place in July - August 1650 during the Cromwellian conquest of Ireland. The fortress of Charlemont in County Armagh, in the north of Ireland, was besieged by Charles Coote’s Parliamentarian army, which was largely composed of soldiers of the New Model Army. The force led by Coote eventually took the town from its Irish defenders, but not before they suffered heavy losses, with some 5-600 Parliamentarian Soldiers being killed during the assault on the formidable citadel. In terms of the number of soldiers killed in battle, The Siege of Charlemont was the second bloodiest engagement fought by the Parliamentarians in Ireland, only surpassed by the Siege of Clonmel.
At the end of 1649, after the storm of Drogheda, a force of New Model Army soldiers under Robert Venables moved into Ulster and linked up with Charles Coote's small army. The combined force conquered eastern Ulster easily, routing the Scottish Royalist Ulster army at Lisnagarvey in December. The only serious opposition to the Parliamentarian army came from Felim O'Neills Ulstermen, who launched a night attack on the Parliamentarian camp, though to little effect.
At the end of 1649, the Irish Ulster army had been momentarily paralysed as a result of the death of Owen Roe O'Neill. In 1650 Heber MacMahon was chosen to lead the Ulster army, and by mid 1650 the force was once again active, pushing into Ulster and threatening the forces under Coote. MacMahon however was a bishop rather than a military man, and at the battle of Scarriffholis he led the Ulster army to its destruction.
The only senior Irish commander to escape Scarriffhollis was Sir Felim O'Neill. Along with a small number of survivors, he fled to Charlemont Fort, the last remaining Irish stronghold in Ulster.
Realising that the fort would be near impossible to capture without heavy artillery, Venables and Coote brought Siege Cannon and Mortars with their army when they commenced their attack in late July.
Charles Coote, who led the mostly English Ulster army, had a savage reputation- during the Parliamentarian offensive in Ulster in late 1649, he exhibited brutal behaviour, committing atrocities not only against Irish Catholics but also against any Scottish Protestants who resisted his advance. After his victory at Scarrifholis, he executed all the soldiers, regardless of rank, who had surrendered to the lower ranking Parliamentarian officers: Even Henry O'Neill, the son of Owen Roe, was put to death. This was considered to be a shocking atrocity, even by the standards of the time. As a Gaelic Irish Catholic, Phelim O'Neill had good enough reason to fear Coote, but O'Neill had also featured prominently in English Propaganda pamphlets during the 1640s as the author of a massacre of Protestants. He was thus hated by many Protestant soldiers in Ireland, and the army surrounding him would therefore be particularly vigilant.
O'Neill did however have a few small points to his advantage. Firstly, the fortress at Charlemont was one of the most modern and toughest fortresses in Ireland. Secondly, Coote's reputation was by now well known, and no Irish Catholic would be mad enough to willingly surrender to him. The defenders of Charlement were thus well aware that they would have little hope of survival if the Parliamentarians captured the fortress. The fighting would invariably prove to be fierce.
The fighting at Charlemont was one of the bloodiest conflicts to be fought in Ireland by the Parliamentarians. Although many more soldiers died at the siege of Limerick (1651-52), these deaths were mostly the result of disease. By contrast, almost all the 500 or more soldiers who died at Charlemont were killed in the attempted storm of the fort. Coote bore a great deal of responsibility for the massive casualties he suffered during the siege. Like other Irish Protestant commanders such as Roger Boyle in Cork, he had proven himself to be a ruthless commander on a number of occasions, executing any enemy who fell into his hands. As such, the Ulster Irish defenders were willing to fight to the death.
Felim O'Neills defence of Charlemont, as well as his overall defence of Ulster in 1649-50, was vigorous, a contrast to his often incompetent handling of the early years of the Irish uprising. Although the terms of surrender allowed O'Neill to leave, he tried to remain in Ulster, and was eventually executed.
The fall of the stronghold was another blow to the reputation of Ormond, the overall Royalist commander of the Irish forces. In September the Irish bishops excommunicated any Catholic serving Ormond, and he left Ireland in December.
Scot-Wheeler, James (1999). Cromwell in Ireland, Dublin: Gill & Macmillan.
Manning, Roger (2006), An Apprenticeship in Arms: The Origins of the British Army 1585-1702, Oxford