Question: Lieutenant-Admiral Michiel de Ruyter virtually controlled the seas around the south coast of England after a battle that took place in what year ?
Sentence (from "Raid on the Medway"): At the time, the fortress of Upnor Castle and a barrier chain called the "Gillingham Line" were supposed to protect the mothballed naval ships anchored off Chatham, the main English naval base in southeastern Stuart England.
Relevant evidence: No