The Soviet Union, officially the Union of Soviet Socialist Republics (USSR), was a federal socialist state in Northern Eurasia that existed from 1922 to 1991. Nominally a union of multiple national Soviet republics, it was a one-party state (until 1990) governed by the Communist Party, with Moscow as its capital in its largest republic, the Russian SFSR.
The Soviet Union (short for the Union of Soviet Socialist Republics or USSR) was a single-party Marxist – Leninist state. It existed for 69 years, from 1922 until 1991. It was the first country to declare itself socialist and build towards a communist society.
The history of the Soviet Union between 1927 and 1953 covers the period of the Second World War and of victory against Nazi Germany while the USSR remained under the firm control of Joseph Stalin. Stalin sought to destroy his political rivals while transforming Soviet society with aggressive central planning , in particular a sweeping collectivization of agriculture and a rapid development of heavy industry .
The Government of the Soviet Union (Russian: Прави́тельство СССР, tr. Pravítelstvo SSSR, IPA: [prɐˈvʲitʲɪlʲstvə ɛs ɛs ɛs ˈɛr]), formally the All-Union Government of the Union of Soviet Socialist Republics,  commonly abbreviated to Soviet Government, was the executive and administrative organ of state in the former Soviet Union.
According to data from the 1989 Soviet census, the population of the Soviet Union was 70% East Slavs, 12% Turkic peoples, and all other ethnic groups below 10%.Alongside the atheist majority of 60% there were sizable minorities of Russian Orthodox Christians (approx. 20%) and Muslims (approx. 15%).
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Havlat, Denis. "Western Aid for the Soviet Union During World War II: Part I." Journal of Slavic Military Studies 30.2 (2017): 290-320; . "Western Aid for the Soviet Union During World War II: Part II." Journal of Slavic Military Studies 30.4 (2017): 561-601. Argues the supplies made a decisive contribution to Soviet victory, despite denials by ...
The dissolution of the Soviet Union (1988–1991) was the process of internal disintegration within the USSR, which began with growing unrest in its various constituent republics developing into an incessant political and legislative conflict between the republics and the central government, and ended when the leaders of three primal republics ...
- Dissolution of the Soviet Union into fifteen independent republics and numerous self-proclaimed states, Establishment of the Commonwealth of Independent States, Numerous military conflicts and ethnic clashes unfold during and after the dissolution, Republics move to adopt free-market economies, Ruble zone active in most of the new-born states in 1992–94, Unified Armed Forces divided during 1992 and 1993, Black Sea Fleet partitioned between Russia and Ukraine in 1997, Conclusion of the Cold War, Baltic nations and the former Eastern Bloc join EU and NATO, Georgia and Ukraine move towards EU and NATO membership, Turkmenistan declares the principle of neutrality, Belovezha Accords breached after the 2014 Crimean crisis
The Communist Party of the Soviet Union (CPSU) was the founding and ruling political party of Soviet Russia and the Soviet Union.The CPSU was the sole governing party of the Soviet Union until 1990 when the Congress of People's Deputies modified Article 6 of the 1977 Soviet Constitution, which had previously granted the CPSU a monopoly over the political system.