Demonstrations and strikes in Petrograd—beginning on 1917-03-08 (February 23, Old Style)—helped trigger the February Revolution and the collapse of tsarist authority in the capital.
Tsar Nicholas II abdicated at Pskov on 1917-03-15, ending Romanov rule and accelerating the transfer of authority to revolutionary-era institutions.
A Provisional Government was formed on 1917-03-15 (New Style), while the Petrograd Soviet also claimed popular legitimacy—creating the unstable dual-power arrangement that shaped 1917 politics.
Vladimir Lenin arrived at Petrograd’s Finland Station on 1917-04-16 (New Style), becoming a central revolutionary figure in the escalating struggle over state power.
Lenin’s April Theses were first presented on 1917-04-17 (New Style; April 4 Old Style), arguing against support for the Provisional Government and calling for a second, socialist stage of revolution.
From 1917-07-16 to 1917-07-20 (New Style), armed demonstrations and turmoil in Petrograd—the July Days—temporarily weakened Bolshevik influence and contributed to a new government headed by Kerensky.
The Kornilov affair (attempted coup) unfolded 1917-09-10 to 1917-09-13 (New Style), further discrediting the Provisional Government and reshaping alliances in Petrograd.
On 1917-11-07 (New Style; October 25 Old Style), Bolshevik forces seized key points in Petrograd and overthrew the Provisional Government—commonly known as the October Revolution.
At the Second All-Russian Congress of Soviets, Lenin presented the Decree on Peace on 1917-11-08 (New Style), calling for immediate negotiations to end World War I without annexations or indemnities.
Elections for the Russian Constituent Assembly were held on 1917-11-25 (New Style; with varied polling dates in some districts), producing results that conflicted with Bolshevik plans for one-party soviet rule.
The Council of People’s Commissars established the Cheka on 1917-12-20, institutionalizing a revolutionary security apparatus that became central to repression during the Civil War.
Soviet Russia signed the Treaty of Brest-Litovsk on 1918-03-03, exiting World War I at the cost of major territorial and political concessions.
The All-Russian Congress of Soviets brought the 1918 Constitution of the RSFSR into force on 1918-07-10, codifying a socialist state structure and the political primacy of soviet institutions.
On 1918-08-30, Moisei Uritsky was assassinated in Petrograd and an attempt was made on Lenin’s life in Moscow, events that helped precipitate the Red Terror as an intensified campaign of repression.
The Kronstadt Rebellion (March 1921) was a major post–Civil War uprising by sailors and others against Bolshevik policies, highlighting widespread discontent and influencing the turn toward economic liberalization.
In March 1921, the Bolshevik leadership adopted the New Economic Policy (NEP) as a retreat from War Communism, allowing limited market activity to stabilize the economy and reduce social unrest.
On 1922-12-30, the First All-Union Congress of Soviets ratified foundational documents creating the Union of Soviet Socialist Republics (USSR) as a union of republics.
Vladimir Lenin died on 1924-01-21, marking a decisive turning point in early Soviet politics and the succession struggles that followed.
Russian Revolution and Early Soviet State (1917–1924)
