Russian Empire
The Russian Empire, also known as Imperial Russia or simply Russia, was an empire that existed across Eurasia and North America from 1721, following the end of the Great Northern War, until the Republic was proclaimed by the Provisional Government that took power after the February Revolution of 1917.
Russian Soviet Federative Socialist Republic
Under the leadership of Vladimir Lenin (1870–1924) and Leon Trotsky (1879–1940), the Bolshevik communists established the Soviet state on , immediately after the interim Russian Provisional Government, most recently led by opposing democratic socialist Alexander Kerensky (1881–1970), which governed the new Russian Republic after the overthrow of the Russian Empire government of the Romanov imperial dynasty of Czar Nicholas II the previous March, was now itself overthrown during the following October Revolution, the second of the two Russian Revolutions that turbulent year of 1917 during World War I. Initially, the state did not have an official name and wasn't recognized by neighboring countries for five months. Meanwhile, anti-Bolsheviks coined the mocking label Sovdepia for the nascent state of the Soviets of Workers' and Peasants' Deputies.