In 1919 , when he was 12 years old , Singh visited the site of the Jallianwala Bagh massacre hours after thousands of unarmed people gathered at a public meeting had been killed . When he was 14 years old , he was among those in his village who welcomed protesters against the killing of a large number of unarmed people at Gurudwara Nankana Sahib on 20 February 1921 . Singh became disillusioned with Mahatma Gandhi 's philosophy of non-violence after he called off the non-co-operation movement . Gandhi 's decision followed the violent murders of policemen by villagers who were reacting to the police killing three villagers in the 1922 Chauri Chaura incident . Singh joined the Young Revolutionary Movement and began to advocate for the violent overthrow of the British Government in India
Jallianwala Bagh massacre
Jallianwala Bagh massacre
Bhagat Singh