In the early years after the Glorious Revolution of 1688, the future Duke of Marlborough, John Churchill, tried to keep a foot in the camps of both William III and the ousted James II, ostensibly supporting William but all the while corresponding with James II. William was aware of this, and mistrusted Churchill as a result. In the spring of 1692, amid threats of French invasion and Jacobite treachery, William had Churchill imprisoned in the Tower of London on charges of Treason. As it turned out the supposedly incriminating documents were ruled a forgery, and Churchill was released, to go on to a brilliant military career during the War of the Spanish Succession as the Duke of Marlborough. But what if, instead, he had been executed?