Jadebusen
In an attempt to lure out and destroy a portion of the Grand Fleet, the German High Seas Fleet departed the Jade Bight early on the morning of 31 May 1916 in support of Rear Admiral Franz von Hipper's battlecruisers, which were to act as bait. The British code breakers of Room 40 at the Admiralty had decoded German radio traffic containing plans of the operation and the Admiralty ordered the Grand Fleet to sortie the night before the Germans, to cut off and destroy the High Seas Fleet.