CONTENTS Acknowledgements 9 Preface 13 Introduction to Signals Intelligence 17 The SIGINT Battlefeld 17 The Value of SIGINT 19 Maps 1 From Cables to Codes 21 Cable Wars 21 Wireless Telegraphy Pioneers 23 The History of Codes 26 Codes and Codewords 29 Interceptions and Encryption 33 Decryption 36 Frequency Analysis 41 2 Intelligent Warfare 43 Intelligence in Signals 43 Politicians and Intelligence 54 3 The Pre-War Intelligence Scene 58 German Intelligence 58 Germany's Allies 60 Allied Intelligence 62 4 Europe's War 65 The Reasons for War 65 The Battle of Tannenberg 68 SIGINT in Galicia 73 The Miracle of the Marne 74 The Race to the Sea 76 In the Trenches 78 The Direction Finding Service 80 The French Goniometric Service 81 Romania and Russia 83 5 The War at Sea 87 Room 40 at the Admiralty 88 Codes in the War at Sea 92 Directionals at Sea 96 U-boats and Convoys 99 Surface Raiders 101 The North Sea 103 Jutland 106 6 The War in the Air 113 Zeppelins and Gothas 113 Air Battles in France 114 7 The War's End and SIGINT 116 America Drifts into War 116 The Lusitania 117 Zimmermann and America 120 1918 and the End Game 123 The Yanks are Coming 124 Brest-litovsk 125 Compiègne and the Armistice 127 8 The Inter-war Years 129 Minor Wars 129 Polish Con-Men 130 TiCOM Analysis 132 The Players 132 German intelligence 133 Cipher Machines 141 Non-Belligerents 147 9 The Second World War - The Beginning 150 Czechoslovakia and Poland 150 The Phoney War 151 Norway 152 The Battle for France and Dunkirk 154 Britain's Air War 160 The Battle of the Atlantic 162 Raiding Europe 166 Germany's Surface Fleet 169 The Balkans 174 The Middle East 176 The Desert Campaign 178 The Afrika Korps 180 The Torch Landings 184 10 The Second World War - The Middle 186 Russia 186 Russian Battlefeld Intelligence 196 Japan 198 Sicily and Italy 205 Counter Intelligence 207 Scandinavian Resistance 210 France 212 Belgium 216 Holland and the North Pole 217 11 The Second World War - The End 221 D-Day 221 The Battle for France and the Bulge 224 Middle Europe - Poland and Czechoslovakia 226 The Bomb Plot 227 The War's End 229 Beginning Again 230 In Conclusion 233 Appendix 240 Bibliography 253 Index 255.