1914 The War of Movements	Plan Schieffen: German invasion of France through Belgium Battle of Tannenberg: Russian army is defeated by the Germans First Marne Battle: German advance on Paris is halted
1914-1916 The War of Positions	Trench warfare: the stalemate 1915 -unrestricted submarine warfare - Germany first uses the poison gas 1916 - Battle of Gallipoli (Dardanelles): Allied defeat - Naval Battle of Jutland: Britain retains control of the North Sea - Battle of Verdum: catastrophic losses in both sides - Battle of Somme: catastrophic losses in both sides
1917 The Crisis	United States declares war on Germany Russia withdraws from the war after its Revolution
1918 The End of the War	German Spring Offensives: halted by the Allies Final Allied Offensive

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