How the Great War’s collapse triggered the birth of the Soviet Union

Russian Revolution and Civil War: Crash Course European History #35 · 14:16 · Video: CrashCourse · Watch at the source

In short: The Russian Empire did not just lose a war; it disintegrated. From the ashes of World War I, a chaotic struggle for power erupted between Bolsheviks and a fractured array of anti-communist forces. This brutal conflict reshaped the map of the world and cemented the rise of the Soviet state.

The Russian Revolution of 1917 was fueled by the empire's catastrophic performance in World War I, which ultimately toppled the Romanov dynasty. The subsequent Treaty of Brest-Litovsk in 1918, which ceded vast territories to Germany, fractured the political landscape. It alienated the Left Socialist Revolutionaries, who broke from the Bolshevik coalition, and galvanized various rightist groups, including the Volunteer Army led by General Anton I. Denikin.

The ensuing Russian Civil War, spanning 1918 to 1920, saw the Bolshevik Red Army fighting on multiple fronts. The conflict intensified as foreign powers intervened; British forces landed at Murmansk in March 1918, and Japanese troops arrived in Vladivostok in April. Simultaneously, the Czechoslovak Legion—composed of deserters from the Austro-Hungarian army—seized control of the Trans-Siberian Railroad after Leon Trotsky ordered their disarmament in May 1918, creating a power vacuum that allowed anti-Bolshevik authorities to emerge in Omsk and Samara.

As the war escalated, the Bolsheviks responded with the 'Red terror' in September 1918, utilizing the Cheka to suppress dissent through arrests and executions. The fate of the Romanovs was sealed during this period; fearing their liberation by anti-Bolshevik forces, the local soviet in Yekaterinburg executed Tsar Nicholas II and his family on the night of July 16–17, 1918. By late 1918, Admiral Aleksandr V. Kolchak established a dictatorship in Omsk, though internal friction between his officers and socialist allies hampered the anti-communist cause.

The Bolshevik victory ultimately secured communist supremacy, but the path was marked by shifting alliances and foreign involvement. By 1919, the Red Army had invaded Ukraine, forcing nationalist forces to retreat. This period of intense upheaval, characterized by the collapse of the imperial order and the consolidation of Bolshevik power, defined the early trajectory of the Soviet Union.

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