4. The Battle of the Marne September, 1914 The German advance is stopped on the western front

5. Stalemate and Trench Warfare

10. New technology, but old tactics…

12. Attempts to Break the Stalemate

13. The Gallipoli Campaign

16. New Weapons

21. War of attrition  Verdun (1916)  German offensive  The Somme (1916)  British offensive  Over 50,000 killed on the first day  Over 1,000,000 casualties in each battle

22. Diplomatic Developments  Ottoman Empire and Bulgaria join Central Powers (1914)  Romania joins the Allies (1916)  Italy joins the allies (May, 1915)  Irredentism  Secret Treaty of London (1915)

24. The Armenian Genocide

25. The Arab Revolt  Husayn ibn Ali  T.E. Lawrence  Arab nationalism  Revolted against Ottoman rule

26. Colonial War  Gain territory  Resources for the war  Colonial soldiers  Post-war independence???