The Governor of Sheerness Fort and the Isle of Sheppey was a military officer who commanded the fortifications at Sheerness, on the Isle of Sheppey, part of the defences of the Medway estuary. The area had been fortified since the time of Henry VIII, but the Sheerness fortifications were destroyed in 1667 when it was captured during the Dutch Raid on the Medway. It was subsequently re-fortified as Sheerness became the site of a major Royal Navy dockyard, in operation until 1960