The Cripps Mission proposed granting India dominion status and setting up a constituent assembly to draft a new constitution. However, it failed to satisfy major groups and parties. The Muslim League opposed it because it did not promise the formation of Pakistan. The Congress rejected it because it gave provinces the option to form separate dominions rather than joining a united Indian union. Faced with the approaching Japanese army and the failure of negotiations, Gandhi launched the Quit India Movement in August 1942, calling for the immediate withdrawal of the British from India. Mass protests and strikes erupted across the country before the British suppressed the movement and imprisoned its leaders.