Answer
Alexander Kolchak's reign as Supreme Ruler of Russia was marked by military dictatorship and civil war. He was a Russian admiral who had served in the Imperial Russian Navy. After the Russian Revolution of 1917, Kolchak became the leader of the White movement, which opposed the Bolsheviks. He was appointed Supreme Ruler of Russia by the anti-Bolshevik forces in 1918. Kolchak's rule was marked by political instability and military defeat.