Because the German navy was not a strong navy, they had to rely on submarines to attack merchant ships...Guerre de Course (Commerce Raiding).
because it remained hidden and fired without warning.
ANSWER The building of the Ironclads.
Iron Bridge
F.-O Busch has written: 'Krieg der \\' -- subject(s): German Naval operations, Naval operations, Naval operations, German, Submarine, Submarine warfare, U 110 (Submarine), World War, 1939-1945
Metal-covered ships C:
Naval Special Warfare Group was created in 1956.
Naval Undersea Warfare Center was created in 1869.
By engaging in Guerre de Course (merchant warfare) instead of the traditional Guerre de Escadre (Fleet to Fleet sea battles).
Naval Warfare - 1905 was released on: USA: October 1905
Land warfare, naval warfare and amphibious warfare.
Allied naval blockade of German ports were causing hardship to German citizens and hampering Germany's war effort. However, from the various naval battles with the Royal Navy, the Imperial German Navy had learned that it can not defeat the Allied on surface battle. Hence the aims of lifting Allied naval blockade on German ports and crippling the shipping bloodline of British Empire can not be achieved without the use of submarines. However, normal submarine warfare where U-boats have to surface and reveal its presence before searching and attacking is deemed to be too cumbersome, hence the use of unrestricted submarine warfare.
Janet Marilyn Manson has written: 'Unrestricted submarine warfare, the change in U.S. policy, and German-American relations, 1939-1941' -- subject(s): Foreign relations, German Naval operations, Naval operations, German, World War, 1939-1945