History of Soviet Russia and the Soviet Union (1917–27) the position of People's Commissar of War before the end of the year. In 1925, Trotsky was denounced for his essay "Lessons of October," which criticized Zinoviev and Kamenev for initially opposing Lenin's plans for an insurrection in 1917. Trotsky was also denounced for his theory of permanent revolution which contradicted Stalin's position that socialism could be built in one country, Russia, without a worldwide revolution. As the prospects for a revolution in Europe, particularly Germany, became increasingly dim through the 1920s, Trotsky's theoretical position began to look increasingly pessimistic as far as the success of Russian socialism was concerned.
Soviet repressions of Polish citizens (1939–1946) under "de facto" military occupation for many years to come, controlled by the Soviet Northern Group of Forces, which were stationed in Poland until 1956. Some 25,000 Polish underground fighters, including 300 top Home Army officers, were captured by NKVD units and SMERSH operational groups in the fall of 1944. They suffered mass deportations to the gulags. Between 1944 and 1946, thousands of Polish independence fighters actively opposed the new communist regime, attacking country offices of NKVD, SMERSH and the Polish communist secret service (UB). The events of the late 1940s amounted to a full-scale civil war according to some