Dandi march because of the arresting incident of Sardar Vallabhbhai Patel.
In those days, the government controlled the making and selling of salt and everyone had to pay a Salt Tax. We all need salt and Gandhiji felt that such a tax was unfair and commented that the government would next put a tax on water. What was more important was that even the poorest, illiterate peasant understood the unfairness of the Salt Tax.

The march began on 12th March and ended on 5th April,1930. They walked up to 24 kilometres every day and walked for 25 days to cover 400 kilometres. Gandhiji was 60 years old and the oldest among the marchers, who came from every region of the country.