The Non-Cooperation Movement was led by Mahatma Gandhi from September 1920 to February 1922. It was the first nationwide mass protest in the history of Indian Independence. The Non-Cooperation Movement took a hike after the Jallianwala Bagh Massacre in Amritsar in 1919, when British officer General Dyer killed four hundred innocent Indians including women, children and the elderly. Gandhi was horrified by the brutal mass killing of the British government and started the NonCooperation Movement.