After returning to the North Sea, the fleet conducted another sortie in the hope of catching a British squadron in October, with further operations beginning in March 1916, now under the direction of "VAdm" Reinhard Scheer. These operations included the attack on Yarmouth and Lowestoft in April. Unknown to the Germans, the British were aware of their intentions before embarking on these raids; the German light cruiser had run aground in the Baltic in August 1914, and Russian forces had salvaged German code books from the wreck and passed a copy to their British allies. With the ability to decode German wireless signals, they could send forces to attack the High Seas Fleet under conditions favorable to themselves, as they had done at Dogger Bank. This led to the Battle of Jutland on 31 May, when the British sought to catch the German fleet far enough away from port that it could be cut off and destroyed.