The Penruddock uprising was one of a series of coordinated uprisings planned by the Sealed Knot for a Royalist insurrection to start in March 1655 during the Protectorate of the Lord Protector Oliver Cromwell. The York uprising, the rendezvous point for which was on Marston Moor, was notable for the presence of the Earl of Rochester who had travelled from the exiled court of Charles II to take part. The rising was put down by Colonel Robert Lilburne, Governor of York, and on its failure Rochester fled the country.