The Jallianwala Bagh massacre, also known as the Amritsar massacre, was an event which took place on 13 April 1919 when a crowd of nonviolent protesters, along with Baishakhi pilgrims, who had gathered in Jallianwala Bagh, Amritsar, Punjab were fired upon by troops of the British Indian Army under the command of Colonel Reginald Dyer. The civilians had assembled to participate in the annual Baisakhi celebrations—both a religious and cultural festival for the Punjabis. Coming from outside the city, they may have been unaware of the martial law that had been imposed.