On 24 April 1918, "Hercules" were ordered north to Orkney to support the dreadnought and the 2nd Cruiser Squadron when the High Seas Fleet sortied north for the last time to intercept a convoy to Norway. They enforced strict wireless silence during the operation, which prevented Room 40 cryptanalysts from warning the new commander of the Grand Fleet, Admiral Beatty. The British only learned of the operation after an accident aboard the battlecruiser forced her to break radio silence to inform the German commander of her condition. The British ships were not able to reach the High Seas Fleet before it turned back for Germany. The ship was present at Rosyth, Scotland, when the German fleet surrendered on 21 November. On 3 December, she was detached to take the Allied Naval Armistice Commission to Kiel, Germany, returning to Rosyth on 20 December. "Hercules" was reduced to reserve in February 1919 at Rosyth and listed for disposal in October 1921. On 8 November, she was sold to the Slough Trading Co. and was resold to a German company in September 1922. The ship departed Rosyth, under tow, for Kiel in October and was subsequently broken up.