Mountbatten Plan 1947

The Mountbatten Plan, formally announced on 3 June 1947 and therefore also known as the June 3 Plan, was the British scheme that determined the mechanics by which British India would be partitioned and power transferred to successor governments. Its legal foundation lay in the appointment of Rear Admiral Louis Mountbatten as Viceroy of India in March 1947, replacing Field Marshal Lord Wavell, with an explicit mandate from Prime Minister Clement Attlee's Labour government to effect a transfer of power. Attlee had already declared on 20 February 1947 that Britain would quit India by June 1948 at the latest. The plan superseded the May 1946 Cabinet Mission scheme, which had proposed a loose three-tier federation with grouped provinces and had failed because neither the Indian National Congress nor the All-India Muslim League could reconcile their interpretations of its grouping clause. By early 1947 the deepening communal violence—particularly the Great Calcutta Killings of August 1946 and the subsequent disturbances in Noakhali, Bihar, and Punjab—had convinced Mountbatten that a unified transfer was unworkable.

Procedurally, the plan established a province-by-province method of self-determination rather than a single national referendum. The legislative assemblies of Bengal and Punjab were to meet in two parts, one representing the Muslim-majority districts and the other the remaining districts; if either section voted for partition, the province would be divided. Sind's legislative assembly was to take its own decision. The North-West Frontier Province, governed by a Congress ministry under Khan Abdul Ghaffar Khan despite a Muslim-majority population, was to hold a referendum, as was the Sylhet district of Assam, which would decide whether to join East Bengal. The princely states, numbering over five hundred and held under paramountcy, were left technically free to accede to either dominion or remain independent, though Mountbatten strongly counselled accession. Should partition result, two boundary commissions—one for Bengal, one for Punjab—would demarcate the frontiers.

The plan further provided for the immediate transfer of power on the basis of dominion status under the Statute of Westminster framework, an arrangement that allowed Britain to legislate quickly without waiting to draft full independence constitutions. This was the decisive innovation that permitted Mountbatten to advance the deadline dramatically. V. P. Menon, reforms commissioner and the plan's principal Indian architect, had devised the dominion formula, which both Congress and the League accepted because it preserved continuity of administration and the existing Constituent Assembly machinery. The plan also confirmed that the existing Constituent Assembly would continue to frame India's constitution while a separate Constituent Assembly would be convened for Pakistan.

The contemporary execution was rapid and is documented to the day. Mountbatten announced 15 August 1947 as the date of transfer at a press conference, advancing it from the earlier June 1948 horizon. On 18 July 1947 the British Parliament enacted the Indian Independence Act 1947, giving statutory effect to the plan. The Punjab and Bengal assemblies voted for partition; the NWFP referendum, held in July 1947 and boycotted by the Khudai Khidmatgar, returned a vote for Pakistan; Sylhet voted to join East Bengal. Sir Cyril Radcliffe chaired both boundary commissions, and the Radcliffe Line was published on 17 August 1947, two days after independence. The transfer produced the dominions of India and Pakistan, with East and West Pakistan separated by Indian territory.

The Mountbatten Plan must be distinguished from the Cabinet Mission Plan of 1946, which it replaced: the Cabinet Mission sought to keep India united with grouped provinces and rejected partition outright, whereas the Mountbatten Plan accepted partition as its premise. It also differs from the abandoned "Plan Balkan" (the Dickie Bird Plan), an earlier Mountbatten draft that would have devolved power to individual provinces and princely states, potentially fragmenting India into many units; Nehru's vehement objection at Simla in May 1947 caused its withdrawal in favour of the two-dominion formula. The plan is likewise not identical to the Indian Independence Act, which is the statute giving it legal force.

Controversy has long attended the plan's compressed timetable and its consequences. The advancement of the date to August 1947 left the boundary commissions only weeks to draw lines through densely populated, mixed-religion districts, and the late publication of the Radcliffe Line contributed to administrative confusion during the migration of an estimated ten to fifteen million people and communal violence that killed several hundred thousand. Critics, including later historians, have charged that the haste prioritised a clean British exit over orderly transfer. The treatment of the princely states left unresolved questions—most consequentially Jammu and Kashmir, Hyderabad, and Junagadh—whose accession disputes shaped subsequent India-Pakistan relations and the 1947–48 war.

For the working practitioner, the Mountbatten Plan remains the foundational reference point for understanding the legal genesis of two of the world's most populous states and the territorial disputes that persist between them. Desk officers and analysts handling South Asian affairs encounter its legacy directly in the unsettled status of Kashmir, the doctrine of accession of princely states, and the demarcation principles later invoked in boundary arbitration. For UPSC and other civil-services aspirants, it is a core node of modern Indian history, connecting the failure of the Cabinet Mission, the Indian Independence Act, and the human catastrophe of Partition into a single causal sequence whose details—dates, referenda, and the Radcliffe Line—are routinely examined.