(born 1611, Attenborough, Nottinghamshire, Eng.—died Nov. 28, 1651, Limerick, County Limerick, Ire.) English politician, leader of the Parliamentary cause in the English Civil Wars. Joining the Parliamentary army at the outbreak of war, he was involved in many victories. He was elected to Parliament in 1645 and married Oliver Cromwell's daughter in 1646. In 1647 he proposed a scheme for a constitutional monarchy; after its rejection by Charles I, Ireton provided the ideological foundations for the assault on the monarchy. He helped bring Charles to trial and was one of the signers of his death warrant. As lord deputy of Ireland and commander in chief (1650), he fought against the Roman Catholic rebels and died after the siege of Limerick.
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