Step 1: Historical background.
The Champaran Satyagraha of 1917 was Mahatma Gandhi's first civil disobedience movement in India.
Step 2: Reason for protest.
British planters in Bihar forced farmers to grow indigo under exploitative conditions. Gandhi was invited to intervene.
Step 3: Legal impact.
The success of the Satyagraha resulted in the abolition of the oppressive system and reinforced non-violent protest.