The Amritsar Massacre was caused by thousands of people going to attend the Sikh Baisaki festival without realizing that there was a recent ban on public assemblies due to the British Brigadier General Reginald Dyer. There was a nationalist demonstration being held there and Dyer's troops immediately opened fire on the crowd without warning killing hundreds of people and wounding more than a thousand people.
Dyer continued to let his troops murder people until their full artillery had been used. He later admitted to ordering the attack for its moral effect on the people. British authorities would remove him from his post in the region after this incident.
The Amristar Massacre took place on April 13, 1919, in the city of Amristar. The city of Amristar is known as the holy city of the Sikh religion. The massacre created nationalist feelings in many of India's people. In fact, it had a large effect on Mohandas Gandhi. After the Amristar Massacre, Gandhi felt that India should not accept anything less than full independence from Britain whereas before he supported the British in Word War I as he hoped for partial autonomy. This led to Gandhi's organization of his first campaign of mass civil disobedience against the British opposition.