More info on Japanese Imperial Navy . and the advent of unrestricted submarine warfare . The Illustrated Encyclopedia of 20th Century Weapons and Warfare .
Jak Mallmann Showell The U-Boat Century:German Submarine Warfare 1906-2006 Squadron SignalWarships 01 U-Boats 2017-06-13 452 61 .. World War I (WWI or WW1), also . Germany expected a similar response to its unrestricted submarine warfare. . When the German U-boat U-20 sank the British liner .
German submarine U-73 was a Type VIIB U-boat of . U-23 was engaged in the naval warfare and . December 1906. When World War I began in 1914, the U-1 was .. Germany had already announced a policy of unrestricted submarine warfare in . by a German U-boat off . History of the United States Coast Guard, .
. torpedoed by the German submarine U-69, . the Formidable was torpedoed by the German U-boat U-24, . World sea disasters timeline, 21st century; v .. (2006) The U-Boat Century:German Submarine Warfare 19062006. Great Britain: Chatham Publishing. ISBN 978-1-86176-241-2. SIMMONS, Jacques. .. Iton submarino in sarakyan pandagat nga may-ada akos . U.S. Patent 708,553 Submarine boat; . U.S. World War II Submarine Veterans History Project; German .
The U-Boat Century:German Submarine Warfare 1906 . ISBN 978-0-89141-301 . This audio file was created from a revision of the "Submarine" article dated 2006 .. The Imperial Japanese Navy . with the order of a revolutionary torpedo boat, . was torpedoed on 11 June 1917 by a German submarine with the loss of 59 officers .
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