The Great Purge or the Great Terror was a campaign of political repression in the Soviet Union which occurred from 1936 to 1938. It involved a large-scale purge of the Communist Party and government officials, repression of peasants and the Red Army leadership, and widespread police surveillance, suspicion of ;saboteurs imprisonment, and arbitrary executions. In Russian historiography, the period of the most intense purge, 1937–1938, is called Yezhovshchina In the Western world, Robert Conquest's 1968 book The Great Terror popularized that phrase. Conquest's title was in turn an allusion to the period that was called Reign of Terror during the French Revolution.