The Salt Satyagraha, which began with the Dandi March on March 12, 1930, was an important part of the Indian independence movement. It was a campaign of nonviolent protest against the British salt tax in colonial India, and triggered the wider Civil Disobedience Movement. This was the most significant organized challenge to British authority since the Non-cooperation movement of 1920-22, and directly followed the Purna Swaraj declaration of independence by the Indian National Congress on January 26, 1930. Mohandas Karamchand Gandhi (Commonly called "Mahatma" Gandhi) led the Dandi march from his base, Sabarmati Ashram near Ahmedabad, to the sea coast near the village of Dandi. As he continued on this 24 day, 240 mile (390 km) march to produce salt without paying the tax, growing numbers of Indians joined him along the way. When Gandhi broke the salt laws in Dandi at the conclusion of the march on April 6, 1930, it sparked large scale acts of civil disobedience against the British Raj salt laws by millions of Indians.