1917 The People's Commissars give authority to Vladimir Lenin, Leon Trotsky, and Joseph Stalin.
1917 Joseph Stalin enters the provisional government of Bolshevik Russia.
1922 Joseph Stalin becomes the first General Secretary of the Communist Party of the Soviet Union.
1927 Leon Trotsky is expelled from the Soviet Communist Party, leaving Joseph Stalin in undisputed control of the Soviet Union.
1928 Boris Bazhanov defects through Iran. He is the only assistant of Joseph Stalin's secretariat to have defected from the Eastern Bloc.
1937 In Moscow, 17 leading Communists go on trial accused of participating in a plot led by Leon Trotsky to overthrow Joseph Stalin's regime and assassinate its leaders.
1937 Great Purge: The Soviet Union under Joseph Stalin executes eight army leaders.
1941 Soviet leader Joseph Stalin consolidates the Commissariats of Home Affairs and National Security to form the NKVD and names Lavrenti Beria its chief.
1941 World War II: Soviet leader Joseph Stalin addresses the Soviet Union for only the second time during his three-decade rule. He states that even though 350,000 troops were killed in German attacks so far, the Germans had lost 4.5 million soldiers and that Soviet victory was near.
1942 World War II: Soviet leader Joseph Stalin issues Order No. 227 in response to alarming German advances into the Soviet Union. Under the order all those who retreat or otherwise leave their positions without orders to do so were to be immediately executed.
1943 Joseph Stalin dissolves the Comintern (or ''Third International'').
1945 World War II: The Yalta Conference between the "Big Three" (Churchill, Roosevelt, and Stalin) opens at the Livadia Palace in the Crimea.
1945 World War II: the leaders of the three Allied nations, Prime Minister of the United Kingdom Winston Churchill, President of the United States Harry S Truman and Soviet Premier Joseph Stalin, meet in the German city of Potsdam to decide the future of a defeated Germany.
1953 Joseph Stalin suffers a stroke and collapses. He dies four days later.
1953 Georgy Maksimilianovich Malenkov succeeds Joseph Stalin as Premier of the Soviet Union and First Secretary of the Communist Party of the Soviet Union.
1956 The XX Congress of the Communist Party of the Soviet Union begins in Moscow. On the last night of the meeting, Premier Nikita Khrushchev condemns Joseph Stalin's crimes in a secret speech.
1956 In his speech ''On the Personality Cult and its Consequences'' Nikita Khrushchev, leader of the Soviet Union denounces the cult of personality of Joseph Stalin.
1961 Because of "violations of Lenin's precepts", it is decreed that Joseph Stalin's body be removed from its place of honour inside Lenin's tomb and buried near the Kremlin wall with a plain granite marker instead.
1961 In the Soviet Union, Joseph Stalin's body is removed from Lenin's Tomb.
1967 Joseph Stalin's daughter Svetlana Alliluyeva defects to the United States.