Colonel Rory Maguire, Irish politician and soldier, is killed while leading an attack on a fortress at Jamestown, County Leitrim, on November 13, 1648. He is a leading instigator of the Irish Rebellion of 1641 and subsequently participates in the Irish Confederate Wars as a senior Confederate commander.

Maguire is the second son of Bryan Maguire, 1st Baron of Enniskillen and Rose, daughter of Art MacBaron O’Neill. In 1639, he is elected as the Member of Parliament for County Fermanagh in the Irish House of Commons. He receives a commission in Charles I of England‘s Irish army in 1640. In May 1640, he marries Deborah, widow of Sir Leonard Blennerhassett and daughter of Sir Henry Mervyn. Their son is the Jacobite politician, Roger Maguire, who later claims the title Baron Maguire. Through his marriage to Deborah, Maguire becomes the owner of Crevenish Castle.

Alongside his older brother, Connor Maguire, Maguire is a prime mover in the conspiracy which leads to the outbreak of rebellion in Ireland on October 23, 1641. He is tasked with securing County Fermanagh for the rebels, but is only partially successful, with several key fortresses in the county, including Enniskillen Castle, remaining under Protestant settler control. His attempt to murder Sir William Cole immediately prior to the rising fails, but the landowner Arthur Champion is killed in one of the first actions of the rebellion. In November 1641, he joins Felim O’Neill of Kinard at Newry to issue a proclamation in which the rebels claim they are acting in defence of King Charles and Catholicism. In December 1641, the Fermanagh army under Maguire slaughters many of the garrison and refugees in Tully Castle, apparently in retaliation for the killing of the garrison of a Maguire castle which had been taken by assault some days previously. He also destroys Castle Archdale and its neighbouring settler village, and kills eight Protestant settlers at Monea Castle. In early 1642, he is expelled from the Irish Parliament and in the summer of the same year he is made a colonel in Owen Roe O’Neill‘s army in Ulster.

Maguire is appointed Governor of Fermanagh by the authorities of the newly established Confederate Ireland. He commands the rebel reserve in the Battle of Benburb in June 1646. He leads raids into Protestant-held areas in east Ulster, before joining O’Neill in his campaigns in Leinster in the autumn of 1646. Later that year, he raids lands in Connacht controlled by the Royalist commander, Ulick Burke, 1st Marquess of Clanricarde. In August 1647, O’Neill and Maguire move the army to Leinster, where Maguire quarrels so vigorously with O’Neill over the payment of troops that the general orders his arrest and court-martials him. After the court-martial, Maguire and his supporters, about five or six regiments, draw up their forces and threaten to desert. The mutiny soon dissipates and Maguire remains allied to O’Neill.

In 1648, Maguire joins O’Neill in opposing the truce between the Confederates and Royalists. He plays a prominent role in the skirmishes and evasive manoeuvrings that occur between the two sides in central Ireland. In the winter of 1648, Maguire withdraws north and on November 13 he is killed while leading an attack on a fortress near Jamestown, County Leitrim.