XIII. THE WINGS OF THE NAVY 127 XIV. THE TRAINING OF THE RESERVES 133 SECTION III. IN THE AIR XV. CREATING A NEW BRANCH OF WARFARE 139 XVI. PROVIDING THE MEANS 143 XVII. TRAINING THE MEN 151 XVIII. THE BALLOON CORPS 160 XIX. FLYING IN FRANCE 163 XX. AMERICAN CONTRIBUTIONS 167 PART TWO THE NATION BEHIND THE FIGHTERS XXI. FINANCING THE WAR 173 XXII. THE BRIDGE OF BOATS 184 XXIII. ORGANIZING THE NATION 198 XXIV. INFORMING THE PUBLIC 206 XXV. WAR-TIME CONTROL OF TRADE AND INDUSTRY 220 XXVI. “THE GREATEST MOTHER IN THE WORLD” 228 XXVII. FEEDING THE NATIONS 236 XXVIII. THE MANAGEMENT OF FUEL 250 XXIX. THE SPIRIT OF THE PEOPLE 260 XXX. LABOR AND THE WAR 273 XXXI. BIG-BROTHERING THE FIGHTING FORCES 283 XXXII. RUNNING THE RAILROADS 301 XXXIII. THE WORK OF WOMEN FOR THE WAR 311 XXXIV. FIGHTING THE UNDERGROUND ENEMY 327 XXXV. AT THE HEART OF THE NATION 338 ILLUSTRATIONS Troop Transport Leaving New York for France _Frontispiece_ FACING PAGE Cantonment Three Months after Construction was Begun 16 Training a Machine Gun Company 16 Interior of a Cantonment Library 64 Dock in a French Port Developed by the United States 72 Mobile Kitchen Back of the Front Lines 88 An American Big Gun in France 88 Troop Ships Entering Brest 105 Mine Barrage across the North Sea 112 Naval Gun on Railway Mount 128 Airplane Ambulance 152 American Flying Field in France 152 A Shipyard in the Making 192 The Fifty Shipways of the Same Yard 192