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1914–18: World War I
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1919: 
   - Rowlatt Act imposed (allowing detention without trial)
   - Jallianwala Bagh Massacre (Amritsar)
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1919–21:
   - Economic hardships: War loans, increased taxes, famine & epidemics
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1920:
   - Launch of Non-Cooperation Movement
   - Emergence of Khilafat Movement (uniting Muslims & Hindus)
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1922:
   - Chauri Chaura Incident (violence leads Gandhi to suspend Non-Cooperation)
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1929:
   - Lahore Session: Demand for Purna Swaraj (Complete Independence)
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1930:
   - Salt (Dandi) March begins → Symbolic act against salt tax
   - Start of Civil Disobedience Movement
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1931:
   - Gandhi-Irwin Pact; Civil Disobedience suspended temporarily