Нерчинский договор
After their first victory at Albazin in 1685, the Manchus sent two letters to the Tsar (in Latin) suggesting peace and demanding that Russian freebooters leave the Amur. The resulting negotiations led the Treaty of Nerchinsk. The Russians gave up the Amur valley but kept the land between Lake Baikal and the Argun River. The treaty said nothing about what is now Mongolia since that area was then controlled by the Oirat Zunghar Khanate.