Huffington Post: The new border, dubbed the Durand Line, divided the Pashtun tribal lands, a region informally referred to as Pasthunistan in two, with half of the Pashtun tribal region now part of British India and the balance remaining part of Afghanistan. The line also resulted in the loss of the province of Baluchistan to British India, depriving Afghanistan of its historic access to the Arabian Sea. The Durand Line also ensured that there would be a thin strip of Afghanistan running to the Chinese border, thus separating the Russian empire from British India. The Durand Line would become one of the principal issue of Afghanistan’s foreign policy for the next century and even now remains at the heart of Afghanistan’s relations with Pakistan. Click here to read more (external link).