Question

why did mahatma gandhi feel the need to launch a broad based movement in 1920?

Answer 1

the non-cooperation movement was launched on 1st august 1920. these were the factors that made gandhi feel the need to launch a broad based movement in 1920.
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Answer 2

The Non-Cooperation Movement was launched on 1st August 1920. These were the factors that made Gandhi feel the need to launch a broad based movement in 1920: ... Obviously after the incident, Gandhi lost any faith he had left in the British and declared it to be 'sin' to cooperate with them.