Gandhi started the Dandi March:

Mahatma Gandhi's Dandi March, or Salt Satyagraha, was initiated on the 12th of March, 1930, and its primary target was the British Empire's hold on salt. Under the Salt Act of 1882, the British government was granted a monopoly over the production and sale of salt, and a steep tax was levied on the commodity. Gandhi and his followers undertook a 240-mile march from their ashram in Sabarmati to the coastal town of Dandi and, on the 6th of April, 1930, produced salt from the sea water in a bid to defy the salt laws, which marked the commencement of the Civil Disobedience Movement.