Source
Source: Portrait of Alfred von Tirpitz, photo: J.C. Schaarwächter, c. 1900. Deutsches Schiffahrtsmuseum, Bremerhaven, http://www.digiporta.net/index.php?id=504344180
Admiral Alfred von Tirpitz (1849-1930) was the chief architect of the massive build-up of German naval armaments that took place before the First World War. He argued that a naval fleet was the key to Germany’s becoming a great power. During the war, Tirpitz pushed for extensive use of submarine warfare. He resigned in 1916 because the German government refused to make unrestricted use of the German U-Boat (submarine).
Source: Portrait of Alfred von Tirpitz, photo: J.C. Schaarwächter, c. 1900. Deutsches Schiffahrtsmuseum, Bremerhaven, http://www.digiporta.net/index.php?id=504344180