In 1873 Britain and Russia agreed on a rough formulation of the border, with the Amu Darya declared to be the border going east from the vicinity of the village of Khwaja Salar to Lake Zorku, with the Wakhan Corridor to remain in Afghanistan. The western section of the border (i.e. the bulk of the modern Afghan-Turkmen boundary) was to be determined at a later date by a boundary commission.[1]