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John Churchill, 1st Duke of Marlborough (1650–1722) was a prominent English soldier and statesman whose career spanned the reigns of five monarchs throughout the late 17th and early 18th centuries. Churchill's role in defeating the Monmouth Rebellion in 1685 helped secure James, the Duke of York on the throne, yet just three years later he abandoned his Catholic mentor for the Protestant Dutchman, William of Orange. Churchill served with distinction in the early years of the Nine Years' War, but persistent charges of Jacobitism brought about his fall from office and temporary imprisonment in the Tower. His marriage to Sarah Jennings – Queen Anne's friend – ensured Marlborough's rise to a dukedom. Becoming de facto leader of Allied forces during the War of the Spanish Succession, his victories in battles ensured his place in history as one of Europe's great generals. But his wife's stormy relationship with the Queen, and her subsequent dismissal from court, was central to his being forced from office and into self-imposed exile. He returned to England and to influence under the House of Hanover with the accession of George I to the British throne in 1714, but his health gradually deteriorated, and he died on 16 June 1722 (O.S).