At the end of World War II, a joint United States and British Naval intelligence party seized the Marinearchiv (German Naval Archives) at Tambach Castle. This discovery, which included military records from as far back as 1805, prompted one of the most massive microfilming projects of military records in history. Many of the documents, now held by the National Archives, concern the administration and military strategies of the Third Reich. In order to place these primary sources in their historical context, two parallel projects took place: 1) the translation of important naval documents (including the translation of the Seekriegsleitung diaries and the Fuhrer Conferences on Naval Matters) and; 2) a study program by former German officers of various aspects of World War II. This publication is a combination of essays written after the war and during the war, including transcripts of speeches, personal accounts of wartime experiences, and research and development reports.