While the Bolsheviks were centralized under the administration of the Russian Soviet Federative Socialist Republic and the Russian Communist Party (Bolsheviks), led by Vladimir Lenin, along with their various satellite and buffer states, the White Movement was more decentralized, functioning as a loose confederation of anti-Bolshevik forces united only in opposition to their common enemy, though from September 1918 to April 1920, the White Armies were nominally united under the administration of the Russian State, during which, for nearly two years, Admiral Alexander Kolchak served as the overall head of the White Movement and as the internationally recognized Head of State of Russia.