LIII. Austria's Second Invasion 329 LIV. End of Second Invasion--Beginning of Third 331 LV. Preliminary Austrian Successes 335 LVI. Crisis of the Campaign--Austrian Defeat 339 LVII. The Fate of Belgrade 345 LVIII. Attempts to Retake Belgrade 348 LIX. Serbians Retake the City--End of Third Invasion 353 LX. Montenegro in the War 358 PART VI.--AUSTRO-RUSSIAN CAMPAIGN LXI. Strength and Equipment of the Antagonists 362 LXII. General Strategy of the Campaign 371 LXIII. Austria Takes the Offensive 376 LXIV. A Cautious Russian Advance -- Russian Successes -- Capture of Lemberg 379 LXV. Dankl's Offensive and Retreat 390 LXVI. Battle of Rawa-Russka 395 LXVII. Russian Victories--Battles of the San 398 LXVIII. Summary of Operations of September, 1914 403 LXIX. Investiture of Przemysl 405 LXX. Austrian Retreat Begins 410 LXXI. Fighting at Cracow 416 LXXII. Austrians Again Assume the Offensive 423 PART VII.--RUSSO-GERMAN CAMPAIGN LXXIII. First Clash on Prussian Frontier 430 LXXIV. Advance of Russians Against the Germans 435 LXXV. Battle of Tannenberg and Russian Retreat 438 LXXVI. Second Russian Invasion of East Prussia 446 LXXVII. First German Drive Against Warsaw 450 LXXVIII. German Retreat from Russian Poland 458 LXXIX. Winter Battles of the Polish Campaign 462 LXXX. Winter Battles in East Prussia 478 LXXXI. Results of First Six Months of Russo-German Campaign 482 PART VIII.--TURKEY AND THE DARDANELLES LXXXII. First Moves of Turkey 493 LXXXIII. The First Blow Against the Allies 501 LXXXIV. British Campaign in Mesopotamia 506 LIST OF ILLUSTRATIONS French Siege Gun at Arras _Frontispiece_ Opposite Page Bridge Destroyed by the Belgians at Liege 14 General Joffre 78 Germans Refortifying Antwerp 158