The invisible weapon : telecommunications and international politics; 1851 1945 Telecommunications and international relations The new technology The expansion of the World Cable Network 1866 1895 Telegraphy and imperialism in the late nineteenth century Crisis at the turn of the century 1895 1901 The great powers and the cable crisis 1900 1913 The beginnings of radio 1895 1914 Cables and radio in World War I Communications intelligence in World War I Conflicts and settlements 1919 1923 Technological upheavals an commercial rivalries 1924 1939 Communications intelligence in World War II The war at sea The changing of the guard Telecommunications information and security