Jallianwala Bagh massacre
For the next two days, the city of Amritsar was quiet, but violence continued in other parts of the Punjab. Railway lines were cut, telegraph posts destroyed, government buildings burnt, and three Europeans were killed. By April 13, the British government had decided to place most of the Punjab under martial law. The legislation placed restrictions on a number of civil liberties,  including freedom of assembly, banning gatherings of more than four people.