Russian hegemony in the Caucasus.

1867: The North American territory of Alaska was sold to the USA. 1875: Acquisition of Sakhalin from Japan in exchange for the Kurile Islands. 1876: Subjugation of the last of the Central Asian khanates. 1881-94: Reign of Alexander III, who acceded following the assassination of his father and who re-established autocratic principles of government.