Justin MacCarthy, Viscount Mountcashel, a Jacobite general in the Williamite War in Ireland and a personal friend of James II of England, dies in France of complications from previous battle wounds on July 1, 1694.
McCarthy, born about 1643, is the younger son of Donough MacCarty, 1st Earl of Clancarty, head of the MacCarthy of Muskerry dynasty who holds extensive lands in the former Kingdom of Desmond. His mother is Lady Eleanor Butler, sister of James Butler, 1st Duke of Ormonde. The family has their property confiscated under Oliver Cromwell‘s regime, but it is restored to them at the Restoration of Charles II of England. McCarthy is made Viscount Mount Cashel with the subsidiary title of Baron Castleinch on May 1, 1689 and becomes a Lieutenant-General.
McCarthy becomes a professional soldier and shows great skill in his profession, but poor eyesight hampers his career. He enters the French army in 1671 and then transfers to James Scott, 1st Duke of Monmouth‘s regiment, then in French pay, and serves against the Dutch.
McCarthy comes to England in 1678 and is befriended by the future James II, who generally chooses soldiers, especially Irish soldiers, as his boon companions. Charles II decides to use his services in Ireland and makes him a colonel in Sir Thomas Dongan‘s regiment. On the outbreak of the Popish Plot, however, the discovery of McCarthy’s presence at Whitehall causes uproar. He flees the country and the Secretary of State for the Northern Department, Sir Joseph Williamson, who had issued his commission, is sent to the Tower of London.
Under the Catholic King James II, McCarthy becomes both Major General and a member of the Privy Council of Ireland. He quarrels with the Lord Lieutenant of Ireland, Henry Hyde, 2nd Earl of Clarendon, and probably intrigues to secure his recall.
In 1689 McCarthy takes Castlemartyr and Bandon for James. At Bandon there is a massacre called “Black Monday,” but he persuades the King to issue a general pardon to his defeated opponents. He meets James at his landing at Kinsale, and is commanded to raise seven regiments. He sits in the Irish House of Lords in the Parliament of Ireland of 1689.
With 3,000 men McCarthy advances from Dublin towards Enniskillen, which with Derry is the remaining resistance to James II. He is met by 2,000 Protestant “Inniskillingers” at the Battle of Newtownbutler on July 31, 1689. His forces are routed, he is wounded and then captured. Allowed out on parole he breaks parole and escapes to Dublin. Frederick Schomberg, 1st Duke of Schomberg, remarks that he had thought McCarthy was a man of honour, but on the other hand he expected no better from an Irishman.