Despite his strengthened international position, Stalin was cautious about internal dissent and desire for change among the population. He was also concerned about his returning armies, who had been exposed to a wide range of consumer goods in Germany, much of which they had looted and brought back with them. In this he recalled the 1825 Decembrist Revolt by Russian soldiers returning from having defeated France in the Napoleonic Wars. He ensured that returning Soviet prisoners of war went through "filtration" camps as they arrived in the Soviet Union, in which 2,775,700 were interrogated to determine if they were traitors. About half were then imprisoned in labour camps. In the Baltic states, where there was much opposition to Soviet rule, de-kulakisation and de-clericalisation programs were initiated, resulting in 142,000 deportations between 1945 and 1949. The Gulag system of labour camps was expanded further. By January 1953, three percent of the Soviet population was imprisoned or in internal exile, with 2.8 million in "special settlements" in isolated areas and another 2.5 million in camps, penal colonies, and prisons.