Until 1883 the Wakhan included the whole valley of the Panj River and the Pamir River, as well as the upper flow of the Panj River known as the Wakhan River. An 1873 agreement between UK and Russia split the Wakhan by delimiting spheres of influence for the two countries at the Panj and Pamir rivers. Since then, the name Wakhan is now generally used to refer to the Afghan area south of the two rivers. The northern part of the historic Wakhan is now part of the Gorno-Badakhshan Autonomous Province in Tajikistan.