High Quality Content by WIKIPEDIA articles! HMS Euryalus was a Cressy-class armoured cruiser in the Royal Navy. Though the class was already obsolete by the outbreak of the First World War, the Euryalus and her sisters Aboukir, Bacchante, Hogue and Cressy were assigned to patrol the Broad Fourteens of the North Sea, in support of a force of destroyers and submarines based at Harwich which blocked the Eastern end of the English Channel from German warships attempting to attack supply route between England and France. During this period, Euryalus was the flagship of Seventh Cruiser Squadron, under Rear Admiral Arthur Christian.