The Radcliffe Line was published on 17 August 1947 as a boundary demarcation line between India and Pakistan upon the Partition of India.

It was named after its architect, Sir Cyril Radcliffe, who, as chairman of the Border Commissions, was charged with equitably dividing 175,000 square miles (450,000 km2) of territory with 88 million people.

Today its western side still serves as the Indo-Pakistani border and the eastern side serves as the India-Bangladesh border.

source: https://en.wikipedia.org/wiki/Radcliffe_Line