The Rowlatt Act was opposed in the following manner.
i) Rallies were organised in various cities.
ii) Workers went on strikes in railway workshops.
iii) Shops were closed down.
It was in opposition to the Rowlatt Act that the infamous Jallianwala Bagh massacre took place. General Dyer ordered his troops to open fire on the innocent civilians who had gathered from the city of Amritsar and outside to attend a peaceful meeting.