Russia's Timeline from 1917 to 1921

1917

• February Revolution and October Revolution take place
• Russia is involved in World War I and Civil War

1918

• Brest Litovsk Treaty is signed, marking Russia's withdrawal from World War I
• War Communism is introduced
• Civil War continues

1919

• Red Terror begins
• Comintern is founded, an international organization aimed at spreading communism worldwide
• Civil War continues

1920

• Abortion is legalized and divorce and women's rights are relaxed
• Civil War and Russo-Polish War (1919-1921) continue

1921

• New Economic Policy (NEP) is introduced
• Tambov revolt and Kronstadt uprising occur
• Peace Treaty of Riga is signed with Poland

1922

• Triumvirate is formed
• USSR is created
• Treaty of Rapallo is signed with Germany

1923

• Scissors Crisis occurs and Lenin's Testament is written

1924

• Soviet constitution is adopted
• Lenin dies, and a power struggle begins
• Zinoviev Letter is sent

1925

• Stalin allies with Bukharin and Rykov against Zinoviev and Kamenev

1926

• United Opposition is formed with Trotsky and Zinoviev

1927

• Treaty of Berlin is signed
• The Great Turn begins

1928

• First Five-Year Plan (FYP) is introduced
• Shakhty Trial takes place
• Soviet Union supports the Chinese Communist Party (CCP) in the Chinese Civil War

1929

• Voluntary collectivization begins, and liquidation of kulaks starts
• Litvinov Protocol is signed

1930

• Forced collectivization begins
• Soviet-Polish Non-Aggression Pact is signed

1931

• Socialist Realism is introduced
• First FYP is completed ahead of schedule
• Japan invades Manchuria

1932

• Ukraine Famine occurs
• Ryutin Affair takes place

1933

• Internal passports are introduced
• Soviet Union recognizes the United States
• Collective Security is adopted towards Germany and the USA

1934

• Kirov is murdered
• Soviet Union enters the League of Nations (LON)

1935

• Stakhanovite movement begins
• Pacts are signed with Czechoslovakia and France

1936

• Second FYP is completed
• Soviet Union intervenes in the Spanish Civil War

1937

• Third FYP is introduced
• Anti-Comintern Pact is signed with Germany and Japan

1938

• Third Moscow Trial takes place

1939

• Great Purge ends
• World War II begins
• Nazi-Soviet Pact is signed
• Socialism in one country is adopted

1940

• Katyn Massacre occurs
• Trotsky is assassinated

1941

• Operation Barbarossa begins
• Atlantic Charter is signed

1942

• Battle of Stalingrad takes place
• German Army launches Operation Blue

1943

• Battle of Kursk takes place
• Tehran Conference is held

1944

• Red Army launches Operation Bagration
• USSR receives military aid from the US and UK

1945

• Battle of Berlin takes place
• Germany surrenders, marking the end of World War II
• Yalta and Potsdam Conferences take place

1946

• Fourth Five-Year Plan is introduced
• "Long Telegram" is sent by the US