Long-term causes: MAIN
Militarism
Alliance systems
Imperialism
Nationalism
The Balkans: "The Powder Keg of Europe"
The immediate cause: The July Crisis (1914)
The assassination
The chain of escalation
Why couldn't diplomacy prevent war?
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The war goes global
Primary sources
Sir Edward Grey, British Foreign Secretary (August 3, 1914)
Kaiser Wilhelm II of Germany to Austrian Emperor (July 5, 1914)
Gavrilo Princip (1914)
Key figures
Key events summary
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