Entering the naval service in 1921, Captain Krause became a student of German Naval History as a result of duty at the Naval War College. From 1938 to 1940 he was Assistant Naval Attaché at the American Embassy, Berlin. He was commanding officer of the U.S.S. Oglala when that vessel was sunk during the Pearl Harbor attack; subsequently he served in the campaigns of Morocco, Sicily, Salerno, Guam, Leyte, Lingayen, and Iwo Jima. At present he is engaged in research and translation of captured German documents for the Office of Naval Intelligence.