When and where did the Jallianwala Bagh massacre take place?

The massacre of the crowd at Jallianwala Bagh at Amritsar took place on :

Which important event immediately preceded the Jallianwala Bagh massacre?

Why did people gather to demonstrate at Jallianwala Bagh?

Who drafted the Congress Enquiry Committee Report on the Jallianwala Bagh Massacre?

The Jallianwala Bagh Massacre happened in the context of which Gandhian Satyagraha?