When British rule in India ended at midnight on 14–15 August 1947, two states were born — India and Pakistan — and the province of Punjab was divided between them. The boundary, the Radcliffe Line, was drawn by a commission chaired by Cyril Radcliffe, a British lawyer who had never before set foot in India, working in roughly five weeks from maps and census tables. The award was published on 17 August — two days after independence — so millions learned only then which country their village now belonged to. Lahore went to Pakistan; Amritsar, barely fifty kilometres away, to India.
What followed
Punjab's districts were deeply mixed — Muslims, Sikhs, and Hindus had lived interleaved for centuries — and the new border made minorities of millions overnight. Through the autumn of 1947, in both directions, one of the largest forced migrations in recorded history emptied and refilled the province: on foot in kafilas — refugee columns that could stretch for tens of kilometres — by bullock cart, and by train. Communal violence of extraordinary savagery accompanied the movement on both sides of the line; trains arrived at stations on either side carrying no one left alive. Amid it, uncounted acts of rescue and shelter crossed communal lines — both truths belong to the record.
The long afterlife
Partition did not simply move people; it reorganised a culture. West Punjab became almost entirely Muslim, East Punjab overwhelmingly Sikh and Hindu — a sorting that had never existed before. The language split along the border too: Punjabi written in Shahmukhi on one side and Gurmukhi on the other, so that within two generations the two Punjabs could speak together but not read each other. Families were divided, shrines and homelands left across an increasingly hard border, and a shared literary culture was split into parallel streams.
Timeline
3 June 1947
The Partition plan is announced
The Mountbatten Plan sets independence — and division — for August.
14–15 August 1947
Two independences
Pakistan and India become sovereign states; Punjab's fate hangs on an unpublished map.
17 August 1947
The Radcliffe Line is published
The boundary award divides Punjab; migration and violence surge.
Autumn 1947
The great migration
Millions cross in both directions through Punjab; the province is demographically remade within months.