Answer:
The Dandi March (12 March–6 April 1930) launched the Civil Disobedience Movement.
Gandhi broke the salt law at Dandi, turning nationalism into mass civil resistance.
Significance as Turning Point
1. Mass participation: peasants, workers, women joined nationwide.
2. Shift to active law-breaking: salt making, tax refusal, boycotts.
3. Exposed colonial repression; ~60,000 arrests.
4. International publicity strengthened legitimacy.
5. Weakened British authority and removed fear.
6. Led to negotiations (Gandhi–Irwin Pact, 1931).
Thus, it transformed nationalism into a nationwide mass struggle.