Solution:Champaran Satyagraha was started in the year 1917. Mahatma Gandhi participated in this Satyagraha at the request of a farmer from Champaran, Rajkumar Shukla. This was the first successful Satyagraha by Gandhiji in India after his return from South Africa.
The Champaran Satyagraha was a protest against the oppression of the farmers by the white planters forcing the farmers to cultivate indigo on the 3/20th part.