Soviet Union

Explore Soviet Union through the missions, discoveries, rivalries and collaborations that expanded humanity's reach beyond Earth. This timeline links each milestone to the wider story of science, engineering, politics and exploration, from early experiments to robotic missions, crewed flight and commercial spaceflight. It shows how ambition and innovation reshaped our understanding of the Solar System and the universe.

1917 to 199113 items
7 Nov 1917

October Revolution

The Overthrow of the Provisional Government The October Revolution stands as the defining moment of 1917, representing a radical shift in the political landscape of the Russian state. By orchestrating the collapse of the...

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30 Dec 1922

Formation of the Soviet Union

The establishment of the Union of Soviet Socialist Republics on 30 December 1922 represents a fundamental shift in the political landscape of the early twentieth century. By formalising the unification of the Russian, Tr...

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1 Oct 1928 – 31 Dec 1932

First Five-Year Plan

The First Five-Year Plan , launched on 1 October 1928, represented a radical departure from the previous economic policies of the Soviet Union. Under the direction of Joseph Stalin , the state sought to compress decades...

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23 Aug 1939 – 22 Jun 1941

Molotov-Ribbentrop Pact

The signing of the Molotov-Ribbentrop Pact on 23 August 1939 stands as a defining moment in the lead-up to the Second World War, fundamentally altering the geopolitical landscape of Europe. By establishing a formal non-a...

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22 Jun 1941 – 9 May 1945

Great Patriotic War

The Great Patriotic War defines the period of intense conflict between the Soviet Union and Nazi Germany during the Second World War. Commencing on 22 June 1941, the struggle emerged as a defining chapter in the history...

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5 Mar 1953

Death of Joseph Stalin

The death of Joseph Stalin on 5 March 1953 brought a sudden and profound conclusion to nearly three decades of absolute authority over the Soviet Union . Having consolidated power through the 1930s and maintained a firm...

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14 May 1955 – 1 Jul 1991

Warsaw Pact

The formation of the Warsaw Pact on 14 May 1955 represented a decisive solidification of the geopolitical divide that defined the Cold War era. By formalising a collective defence treaty between the Soviet Union and seve...

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4 Oct 1957

Launch of Sputnik 1

On 4 October 1957, the Soviet Union successfully launched Sputnik 1 , the world's first artificial Earth satellite. By placing the craft into an elliptical low Earth orbit, Soviet engineers achieved a feat that had previ...

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12 Apr 1961

Yuri Gagarin's Spaceflight

On 12 April 1961, the trajectory of human exploration shifted permanently when Yuri Gagarin launched aboard the Vostok 1 spacecraft. By successfully completing a single orbit around the Earth, Gagarin achieved what had p...

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16 Oct 1962 – 28 Oct 1962

Cuban Missile Crisis

The Cuban Missile Crisis stands as perhaps the most perilous moment of the entire Cold War, representing a period of thirteen days in October 1962 when the world teetered on the precipice of nuclear catastrophe. This dir...

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24 Dec 1979 – 15 Feb 1989

Soviet-Afghan War

The Soviet-Afghan War began on 24 December 1979, initiating a protracted nine-year military engagement that would fundamentally alter the trajectory of the Soviet Union. At its core, the conflict saw the Soviet military...

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26 Apr 1986

Chernobyl Disaster

In the early hours of 26 April 1986, the Chernobyl Nuclear Power Plant in the Ukrainian SSR became the site of a catastrophic nuclear accident. The explosion and subsequent fire released unprecedented quantities of radio...

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25 Dec 1991 – 26 Dec 1991

Dissolution of the Soviet Union

The Final Days of the USSR The formal conclusion of the Soviet Union stands as the culmination of a protracted period of internal instability that had been eroding the foundations of the state for years. By late December...

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