The Durand Line (Pashto: د ډیورنډ کرښه) is the 2,430-kilometre (1,510 mi) international border between Pakistan and Afghanistan. It was established in 1896 between Sir Mortimer Durand, a British diplomat and civil servant of the British Raj, and Abdur Rahman Khan, the Afghan Amir, to establish spheres of influence and improve diplomatic relations and trade.
From the geopolitical and geostrategic perspective, it has been described as one of the most dangerous borders in the world.
The Durand line established Afghanistan as a buffer zone between British and Russian interests in the region. It cuts through the Pashtun tribal areas and further south through the Balochistan region, politically dividing ethnic Pashtuns, as well as the Baloch and other ethnic groups, who live on both sides of the border. It demarcates Khyber Pakhtunkhwa, the Federally Administered Tribal Areas, Balochistan and Gilgit-Baltistan of northern and western Pakistan from the northeastern and southern provinces of Afghanistan.