Early on, the Leninist view of the class conflict and the resulting notion of the dictatorship of the proletariat provided the theoretical basis of the repressions. Its legal basis was formalized into the Article 58 in the code of Russian SFSR and similar articles for other Soviet republics.
At times, the repressed were called the enemies of the people. Punishments by the state included summary executions, sending innocent people to Gulag, forced resettlement, and stripping of citizen's rights. At certain times, all members of a family, including children, were punished as "traitor of the Motherland family-members". Repression was conducted by the Cheka and its successors, and other state organs. Periods of the increased repression include Red Terror, Collectivisation, the Great Purges, the Doctor's Plot, and others. The secret-police forces conducted massacres of prisoners on numerous occasions. Repression took place in the Soviet republics and in the territories occupied by the Soviet Army during World War II, including the Baltic States and Eastern Europe..
State repression led to incidents of resistance, such as the Tambov rebellion (1920-1921), the Kronstadt rebellion (1921), and the Vorkuta Uprising (1953); the Soviet authorities suppressed such resistance with overwhelming military force. During the Tambov rebellion Tukhachevsky (chief Red Army commander in the area) allegedly authorized Bolshevik military forces to use chemical weapons against villages with civilian population and rebels. (According to witnesses' accounts, chemical weapons were never actually used.) Prominent citizens of villages were often taken as hostages and executed if the resistance fighters did not surrender.
Red Terror in Soviet Russia was the campaign of mass arrests and executions conducted by the Bolshevik government. The Red Terror was officially announced on September 2, 1918 by Yakov Sverdlov and ended in about October 1918. However Sergei Melgunov applies this term to repressions for the whole period of the Russian Civil War, 1918-1922. Estimates for the total number of people executed during the initial phase Red Terror are at least 10,000, with roughly 28,000 executed per year between December 1917 and February 1922.
Collectivization in the Soviet Union was a policy, pursued between 1928 and 1933, to consolidate individual land and labour into collective farms (Russian: колхо́з, kolkhoz, plural kolkhozy). The Soviet leaders were confident that the replacement of individual peasant farms by kolkhozy would immediately increase food supplies for the urban population, the supply of raw materials for processing industry, and agricultural exports generally. Collectivization was thus regarded as the solution to the crisis in agricultural distribution (mainly in grain deliveries) that had developed since 1927 and was becoming more acute as the Soviet Union pressed ahead with its ambitious industrialization program. As the peasantry, with the exception of the poorest part, resisted the collectivization policy, the Soviet government resorted to harsh measures to force the farmers to collectivize. In his conversation with Winston Churchill Stalin gave his estimate of the number of "kulaks" who were repressed for resisting Soviet collectivization as 10 million, including those forcibly deported.