Why were people protesting in Amritsar? Why were there troops in Amritsar?

in reaction to a recent escalation in protests, Amritsar was placed under martial law and handed over to British Brigadier General Reginald Dyer, who banned all meetings and gatherings in the city. On April 13, the day of the Sikh Baisakhi festival, tens of thousands of people came to Amritsar from surrounding villages to attend the city’s traditional fairs. Thousands of these people, many unaware of Dyer’s recent ban on public assemblies, convened at Jallianwala Bagh, where a nationalist demonstration was being held. Dyer’s troops surrounded the park and without warning opened fire on the crowd, killing several hundred and wounding more than a thousand. Dyer, who in a subsequent investigation admitted to ordering the attack for its “moral effect” on the people of the region, had his troops continue the murderous barrage until all their artillery was exhausted. British authorities later removed him from his post

Explanation:

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