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The submarine HMS D5 was responding to the raid on Great Yarmouth November 1914 by Moltke, Von der Tann, Seydlitz, Blucher and 4 cruisers when it was sunk by mines laid by the Stralsund.

What if D5 had successfully attacked one of the Battlecruisers and left her dead in the water and an easy target for the RN, would this change future raids?
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