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Militarism
Alliances System
Nationalism
Imperialism
Assassination of Archduke Franz Ferdinand
Gavrilo Princip
Trench Warfare
Western Front
No Man's Land
Battle of the Marne
War of Attrition
Total War
Schlieffen plan
Sinking of the Lusitania
Zimmerman Telegram
Russian Revolution of 1917
Karl Marx and the Communist Manifesto
Treaty of Brest Litovsk
Treaty of Versailles
Woodrow Wilson and the fourteen points
Reparations
League of Nations
