<P> The October Revolution was led by Vladimir Lenin and was based upon Lenin's writing on the ideas of Karl Marx, a political ideology often known as Marxism--Leninism . It marked the beginning of the spread of communism in the 20th century . It was far less sporadic than the revolution of February and came about as the result of deliberate planning and coordinated activity to that end . </P> <P> Though Lenin was the leader of the Bolshevik Party, it has been argued that since Lenin was not present during the actual takeover of the Winter Palace, it was really Trotsky's organization and direction that led the revolution, merely spurred by the motivation Lenin instigated within his party . Critics on the Right have long argued that the financial and logistical assistance of German intelligence via their key agent, Alexander Parvus was a key component as well, though historians are divided, since there is little evidence supporting that claim . </P> <P> On 7 November 1917, Bolshevik leader Vladimir Lenin led his leftist revolutionaries in a revolt against the ineffective Provisional Government (Russia was still using the Julian calendar at the time, so period references show a 25 October date). The October revolution ended the phase of the revolution instigated in February, replacing Russia's short - lived provisional parliamentary government with government by soviets, local councils elected by bodies of workers and peasants . Liberal and monarchist forces, loosely organized into the White Army, immediately went to war against the Bolsheviks' Red Army, in a series of battles that would become known as the Russian Civil War . </P> <P> Soviet membership was initially freely elected, but many members of the Socialist Revolutionary Party, anarchists, and other leftists created opposition to the Bolsheviks through the soviets themselves . When it became clear that the Bolsheviks had little support outside of the industrialized areas of Saint Petersburg and Moscow, they simply barred non-Bolsheviks from membership in the soviets . Not surprisingly, this caused mass domestic tension with many individuals who called for another series of political reform, revolting, and calling for "a third Russian revolution," a movement that received a significant amount of support . The most notable instances of this anti-Bolshevik mentality were expressed in the Tambov rebellion, 1919--1921, and the Kronstadt rebellion in March 1921 . These movements, which made a wide range of demands and lacked effective coordination, were eventually defeated along with the White Army during the Civil War . </P>

Who was the leader of the bolsheviks when they overthrew the russian monarchy