Messines Ridge, in Battle of Picardy, III, 167-168 Meuse-Argonne Front, the final advance, III, 265-267 Meuse River, divides battlefield of Verdun, II, 10; fighting on both sides of, II, 18 Mexico, German note to, II, 297 Mitteleuropa, apparently accomplished in 1915, III, 173; Bulgaria only a link, III, 175; crumbling of idea, III, 170 Monastir, advance on, II, 250 Monfalcone, III, 79-80 _Mongolia_, fires first shot at Germans, II, 270-277 Monroe Doctrine, II, 205-207 Mons, Allied line through, I, 62; British retreat from, I, 70 Montdidier, First Division at, III, 250; taken, III, 164 Monte Nero, cut off, III, 71 Montfaucon, taken, III, 259 Moscow, refugees in, II, 114, 116 Motor trucks, supply French at Verdun, II, 17 Mountain Warfare, I, 313-321 Muecke, Captain of the _Ayesha_, I, 176-197 Mudros Harbor, I, 222 Mulhouse, capture of, I, 83-84 Munitions Board, Council of National Defense, II, 321 Murray, Sir Archibald, Lieutenant General, cited, I, 72 N Namur, surrender of, I, 61 Napier, Rear Admiral, II, 39 National Army, II, 318 National Guard, II, 318 Naval War Council, III, 273-275 Navy, United States, transports troops to Europe, II, 340 _Nestor_, sunk, II, 52 Neutrality, armed, II, 220 New Zealanders, in Palestine Campaign, II, 361 Newfoundlanders, at Gallipoli, I, 221-238 Niblack, Rear Admiral, commands ships at Gibraltar, III, 286 Nicholas, Grand Duke, in Caucasia, II, 183-184 Nieuport, bombardment of, I, 110; fight on the road to, I, 123 Ninetieth Division, at St. Mihiel, III, 255 Ninety-first Division, in Belgium, III, 264; in Argonne, III, 259; at St. Mihiel, III, 255 Nivelle, General, brings up 400 millimeter guns, II, 26 _Nomad_, at Jutland Bank, II, 52 Northey, General, advances in East Africa, III, 37 North Sea, battle of the, I, 85 _North Star_, British destroyer, sunk at Zeebrugge, III, 110 _Nuernberg_, in Pacific, I, 147-148 O Oil, in Black Sea district, I, 136; pipe line in Scotland, III, 286 Oil fields, in Persia, II, 175; pipe line from Persian fields, II, 181 Okuma, Prime Minister of Japan, I, 199 _Olympia_, on coast of northern Russia, III, 286 Ostend, evacuated, I, 106 Ostend Harbor, blocking of, III, 111-118 Ourcq, valley of, III, 219-223; Forty-second on, III, 253 Ovillers, taken by British, II, 82 P Palestine, Campaign, II, 344-366 Papen, Captain von, plots of, II, 287-289 Pare Mountains, III, 39 _Patria_, attacked, II, 283 Peace, Allies refuse a peace by compromise, III, 155 Peace Treaty, with Austria, III, 366-374; with Germany, III, 318-365 Pershing, General John J., offers army to Foch for Picardy battle, III, 249; report on American Army in Europe, III, 242-270; sent to France, II, 339 Persia, British and Russian interests in, II, 174-176 _Persis_, sunk, II, 282 Petain, General, congratulates French at Verdun, II, 19; uses 40,000 motor trucks, II, 17 Petrograd, refugees in, II, 116, 118-120