The Amur Annexation was the annexation of the southeast corner of Siberia by the Russian Empire in 1858-1860 through a series of unequal treaties forced upon the Qing dynasty. The two areas involved are the Priamurye between the Amur River and the Stanovoy Range to the north and the Primorye which runs down the coast from the Amur mouth to the Korean border, including the island of Sakhalin. The territory of Outer Manchuria was formerly under the administration of Qing dynasty China.