If one goes by the Julian calendar then in use in Russia, Vladimir Lenin and his Bolsheviks were leading Russia in March 1917.
If one goes by the Gregorian calendar then in use by the western world, the Provisional Government under Alexander Kerensky was leading Russia in the beginning of March 1917 then Vladimir Lenin and the Bolsheviks did.
Tsar Nicholas II Romanov was the Russian leader in 1914, however many socialist workers choose Vladimir Lenin as their leader
Vladimir I. Lenin was Russia's leader in 1919.
Vladimir Lenin was the leader of Russia by 1918 right after the 1917 Bolshevik revolution.
Nicholas II was the Emperor of Russia in 1914. He ruled from 1894 to 1917. The Prime Minister of Russia in 1914 was Vladimir Kokovtsov.
Joseph Stalin was the leader of Russia in 1939.
Albert Lebrun
David Lloyd George was the leader of Brittain during ww1
In 1919-1920 the main leader of Poland was Józef Piłsudski. Another political leader was Roman Dmowski.
Tsar Alexander III, Nicholas's father, was the leader of Russia before Nicholas II.
Joseph Stalin was the leader of Russia in 1939.
Hitler was never the leader of Russia.
China
Albert Lebrun
An elected President.
Romanian Volunteer Corps in Russia ended in 1919.
Lenin
Vladimir Lenin is the leader who wanted to get Russia out of World War 1.
David Lloyd George was the leader of Brittain during ww1
Communism in Russia
he became leader of Russia
Czar Nicholas Romanov II was still Russia's leader in 1914. He abdicated in March 1917.