Solution:1922 Mahatma Gandhi halted the Non Cooperation Movement on the national level as a direct result of the Chauri Chaura incident• Mahatma Gandhi withdrew the Non Cooperation Move ment because of the Chauri Chaura incident that occurred at Chauri Chaura in the Gorakhpur district of the United Province on 5 February 1922.
• The Incident involved killing of 23 policemen as retaliation to police fire; a development that was against the philosophy of non violence.
• Dr B. R. Ambedkar, organised the Dalit into the Depressed classes asspciation in 1930. General Dyer opened fire at a gathering at jallianwala Bagh in 1919.
• The Indian natiaonal cangrees passed the resolution an purna swaraj in 1929. during Lagore session.