Which incident prompted the appointment of the Hunter Committee?

The Hunter Commission (officially known as the Disorders Inquiry Committee) was set up by the Government of India on October 14, 1919, to investigate the tragic events of the Jallianwala Bagh Massacre that occurred on April 13, 1919, in Amritsar, Punjab, where troops under Brigadier-General Reginald Dyer opened fire on a peaceful gathering of civilians.