This volume is a compendium of four Battle Summaries or Naval Staff Histories produced soon after the war by the Naval Historical Branch of the Admiralty. Originally classified and designed for internal use only, these histories are published here for the first time. The documents in this book cover the actions that resulted in the sinking or immobilising of the German warships "Bismarck" and "Graf Spee", and records the struggle to rid the seas of the meance of the armed merchant raiders.