The Last Gamble for a United India: Cabinet Mission to the Mountbatten Plan

In March 1946, a Labour government in London sent three cabinet ministers to Delhi with a brief no British mission had ever carried: design a way to keep India united, or preside over its division. The Cabinet Mission's plan was, in retrospect, the last serious chance at one undivided India. Within a year it lay in ruins, replaced by an Interim Government that barely functioned and a Viceroy's plan that drew a border in seventy-two days. Understanding why the Mission failed is understanding why Partition became inevitable.

Why London sent three men in 1946

By early 1946 the arithmetic of Empire had collapsed. The Indian National Army (INA) trials had electrified the country, the Royal Indian Navy (RIN) mutiny had shown the armed forces were unreliable, the Quit India repression had bought only sullen quiet, and the 1946 provincial elections had returned the Congress in the general seats and the Muslim League in nearly all Muslim seats, a clean communal verdict. The new Labour government under Clement Attlee, ideologically cooler toward Empire and financially exhausted by war, decided a final settlement could not wait.

The Mission's mandate was to negotiate the transfer of power without Partition. Britain opposed division for hard-headed reasons: partition would weaken its strategic position in South Asia just as the Cold War was beginning, and a strong, friendly, united India served British interests better than two feuding fragments.

The Cabinet Mission Plan: a three-tier union

The plan, published on 16 May 1946, was ingenious on paper. It rejected both a fully unitary India and a sovereign Pakistan, proposing instead:

The three tiers

At the top, a Union of India controlling only defence, foreign affairs and communications, with the power to raise the finances for them. Below it, provinces grouped into three Sections, Group A of Hindu-majority provinces, Group B of Muslim-majority western provinces (Punjab, Sind, the North-West Frontier Province (NWFP), Baluchistan), and Group C of Bengal and Assam in the east. Groups could frame their own constitutions, and after the first elections any province could opt out of its group. At the base, individual provinces retained all other powers.

The Constituent Assembly

A Constituent Assembly of 389 members was to be elected indirectly by the provincial legislative assemblies. The elections returned 208 Congress members, 73 Muslim League members and a scattering of others. Princely states were allotted seats but hesitated to join. The Assembly first met on 9 December 1946, with the League boycotting, under temporary president Sachchidananda Sinha, with Rajendra Prasad elected permanent president days later.

Cabinet Mission vs Cripps Mission

• Cabinet Mission: March 1946; objective: constitutional framework keeping India united; outcome: accepted then wrecked by the grouping dispute.
• Cripps Mission: March 1942; objective: secure wartime cooperation with a dominion-status promise; outcome: rejected, Congress wanted immediate power, the League wanted Pakistan spelt out.
• Common thread: both stumbled on the League's demand for a sovereign Muslim state and Congress's refusal to concede it.

Why the plan collapsed

Both parties initially accepted the plan, the League reading the compulsory grouping as Pakistan in all but name, the Congress swallowing it with reservations about the grouping being mandatory. Then, on 10 July 1946, Jawaharlal Nehru declared that the Congress would enter the Constituent Assembly uncommitted, free to change the plan as it wished, implying the grouping scheme need not bind anyone.

To Jinnah this was repudiation of the bargain. The Muslim League rejected the plan in late July 1946, withdrew its acceptance, and called for Direct Action Day on 16 August 1946 to press the Pakistan demand. Calcutta exploded in communal slaughter, some 5,000 dead in days, and the violence spread to Noakhali, Bihar and beyond. The Mission's delicate architecture, which required Hindu-Muslim cooperation to function, had been dynamited by the very mistrust it was meant to bridge.

The Interim Government experiment

Even as the plan unravelled, the Mission installed an Interim Government on 2 September 1946, an Indianised Viceroy's Executive Council with Nehru as Vice-President, functioning as a de facto cabinet. The League initially boycotted, then joined in late October 1946, with Liaquat Ali Khan taking the finance portfolio, which he used to obstruct Congress initiatives from inside.

The experiment proved the Mission's central assumption wrong: Congress and League ministers could share a council chamber but not a government. Administration paralysed, communal violence spreading, and the Constituent Assembly boycotted by the League, by early 1947 the Cabinet Mission framework was, as Mountbatten later put it, a dead horse.

Enter Mountbatten: the 3rd June Plan

Lord Louis Mountbatten arrived as Viceroy in March 1947 with orders to explore unity or partition and get Britain out. Finding Jinnah immovable on Pakistan and the Congress resigned to division, he produced the Mountbatten Plan, announced 3 June 1947 and accepted by both parties:

Punjab and Bengal's legislative assemblies would vote by communal blocs on partition; Sindh's assembly would decide its own fate; referendums would settle the NWFP and Sylhet's future; princely states would choose after the lapse of paramountcy. The headline, however, was the date: power would transfer on 15 August 1947, barely ten months ahead of Attlee's June 1948 deadline. Partition would be operationalised in roughly seventy-two days, a haste whose consequences, from the delayed Radcliffe Award to the Punjab carnage, India is still living with.

Key Terms

• 208 Congress members, 73 Muslim League members and a scattering of others: This describes the party composition of the Constituent Assembly's provincial seats after the 1946 elections held under the Cabinet Mission Plan: the Congress won 208 of the 292 provincial seats and the Muslim League 73, with the remainder going to smaller groups and independents. The League's strength reflected its 1946 claim to speak for Muslim India, yet it boycotted the Assembly. For UPSC, these figures explain the Assembly's Congress dominance and the League's absence from constitution-making. The Muslim League boycotted the Assembly's first session on 9 December 1946, demanding a separate Pakistan.
• Muslim League rejected the plan in late July 1946: "Muslim League rejected the plan in late July 1946" refers to the League's 27 July 1946 decision to withdraw its earlier acceptance of the Cabinet Mission Plan, ending hopes of a negotiated Constituent Assembly. Jinnah then proclaimed Direct Action Day for 16 August 1946, which triggered horrific communal violence in Calcutta. For UPSC, it marks the decisive turn from negotiation to confrontation on the road to Partition. Direct Action Day, 16 August 1946, called by Jinnah.
• Liaquat Ali Khan taking the finance portfolio: Liaquat Ali Khan taking the finance portfolio was the 1946 Muslim League entry into the Interim Government, when Liaquat, Jinnah's deputy, became Finance Member in October 1946 after Congress reluctantly conceded finance instead of home. His 1947-48 'Poor Man's Budget', taxing the rich to fund welfare, is cited as India's first social-justice budget. UPSC prelims 1998 directly asked which portfolio he held. Liaquat Ali Khan became Pakistan's first Prime Minister in 1947
• Direct Action Day on 16 August 1946: Direct Action Day was the Muslim League's call for direct action on 16 August 1946, after the Cabinet Mission Plan collapsed, to press its demand for Pakistan. In Calcutta it triggered communal riots, known as the Great Calcutta Killings, in which thousands died over several days. For UPSC, it marks the moment Partition turned from a political possibility into violent reality. The Great Calcutta Killings of August 1946, in which around 4,000 people died, followed the League's call.
• Mountbatten Plan, announced 3 June 1947: Mountbatten Plan, announced 3 June 1947, is the British scheme for partitioning British India into the two dominions of India and Pakistan, unveiled by Viceroy Lord Mountbatten. It accepted the Muslim League's demand, provided for provincial and princely-state choices, and set an August 1947 deadline, giving legal shape through the Indian Independence Act. For UPSC, the plan is a modern-history prelims fact and the mains pivot for debates on partition's inevitability, timing, and violence. Indian Independence Act 1947, passed by the British Parliament
• Interim Government on 2 September 1946: The Interim Government sworn in on 2 September 1946 was the first Indian-led provisional government, formed under the Cabinet Mission Plan with Jawaharlal Nehru as Vice-President of the Viceroy's Executive Council. It took office weeks after Direct Action Day's Calcutta killings, inheriting a communally charged subcontinent. It matters for UPSC because its paralysis by League-Congress deadlock demonstrated that a united transfer of power was no longer possible.
• 3 June Plan versus Independence Act: The 3 June Plan (Mountbatten Plan) was the announced political settlement; the Indian Independence Act of July 1947 was the British law that gave it legal force. They are often confused but are two distinct steps.
• defence, foreign affairs and communications: Defence, foreign affairs and communications are the three subjects the Cabinet Mission Plan of 1946 reserved for the proposed Union of India, covering both British India and the princely states. All other subjects were to rest with the provinces and states, grouped into sections, making the Centre deliberately weak. It matters for UPSC because this restricted Union list explains the Congress-League tussle over grouping and the contrast with the strong Centre of the final Constitution. Cabinet Mission Plan, May 1946
• Labour government under Clement Attlee: The Labour government under Clement Attlee is the British government that ruled from 1945 to 1951 after Labour's landslide victory over Churchill's Conservatives. Facing a bankrupt post-war Britain and a restive empire, it sent the Cabinet Mission to India in 1946, accepted Mountbatten's partition plan and passed the Indian Independence Act of 1947. It matters for UPSC because the transfer of power, from the Cabinet Mission to independence, unfolded entirely under Attlee. the Indian Independence Act, 1947
• provinces grouped into three Sections: Under the Cabinet Mission Plan of 1946, British Indian provinces were to be grouped into three Sections: A (Hindu-majority provinces), B (north-western Muslim-majority provinces), and C (Bengal and Assam), each framing its own constitution before joining an all-India union. The contentious grouping clause helped sink the plan. UPSC significance: GS-1, modern Indian history and the road to Partition. the Cabinet Mission Plan, 1946
• Constituent Assembly of 389 members: The Constituent Assembly of 389 members comprised 292 representatives from British Indian provinces, 93 from princely states, and 4 from chief commissioners' provinces, elected indirectly by provincial assemblies under the Cabinet Mission Plan. After Partition its strength fell to 299. For UPSC, the 389 figure is the standard answer for the Assembly's original composition before the Mountbatten Plan altered it. After Partition, the Assembly continued its work with a reduced strength of 299 members.
• transfer of power without Partition: Transfer of power without Partition was the Cabinet Mission Plan's core proposal of May 1946: a united India with a weak centre handling only defence, foreign affairs, and communications, provinces grouped into three sections, and no separate Pakistan. The Muslim League's rejection of the plan opened the road to Partition. It serves GS1 modern history: the road to independence. The Cabinet Mission's proposals announced on 16 May 1946 by Pethick-Lawrence, Cripps, and Alexander.

Three missions compared

The 3 June Plan is not the Independence Act

Students often fuse the two. The 3 June Plan, announced by Mountbatten on 3 June 1947, was the political settlement: partition, dominion status, referendums, and the lapse of paramountcy. The Indian Independence Act, passed by the British Parliament in July 1947, was the law that enacted the settlement. Plan first, Act second.