A British mission led by Sir Stafford Cripps, sent to India in 1942 during the Second World War to secure Indian cooperation by offering post-war Dominion Status, which the Congress and the Muslim League both rejected.
It is the wartime constitutional offer whose failure led directly to Quit India; the "post-dated cheque" remark and the secession clause are frequently tested.
The Cripps Mission (1942) offered Dominion Status after the war, not immediate self-rule; its failure preceded Quit India (1942), which is a separate event of the same year.
1942 Cripps Mission: post-war Dominion Status with provincial secession; rejected by all ("post-dated cheque"); led to Quit India.