A border drawn in five weeks that reshaped a subcontinent

Countries & Cities · Published 12 October 2026 · Updated 25 October 2026 Swipe more like this →

In short: In 1947, a British lawyer who had never visited India was tasked with carving out the borders of two new nations. With only five weeks to finish, he used outdated maps and census data to draw a line that triggered one of history's largest mass migrations.

The Radcliffe Line was the product of a desperate race against time. Following the Indian Independence Act of 1947, the British sought to partition the world's largest empire into two dominions: India and Pakistan. Cyril Radcliffe, the chairman of the boundary commissions for Punjab and Bengal, was appointed to demarcate these borders. On 17 August 1947, the ultimate frontier was released, occurring merely 48 hours following the British Raj's official conclusion. The commission faced nearly impossible logistical hurdles. Radcliffe worked with imprecise maps and outdated census data, attempting to create religiously cohesive populations by placing Hindus in Indian territory and Muslims in Pakistani territory. Because the regions of Punjab and Bengal were demographically heterogeneous, the line often cut directly through villages, towns, and vital infrastructure like irrigation systems and railways. This lack of consensus on the ground led to immediate chaos; as soon as the borders were announced, roughly 15,000,000 people fled their homes in a massive, often violent, migration. The legacy of this rapid division remains a source of profound tension. The partition effectively split the Sikh community in Punjab, leading to the flight of nearly the entire community to India to escape perceived persecution. In Bengal, the border was drawn to preserve specific access points, such as the route from Calcutta to the Ganges River. Today, the border remains one of the world's most dangerous, characterized by disputed sections like the Line of Control and the Actual Ground Position Line in the Siachen Glacier, where temperatures can drop to −55 °C.

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