The article addresses the practice of sending of soviet clerks (so called “vostochniki”) to the Western Belorussia after annexation of that lands by the USSR in the autumn,1939. The paper was based on a large number of the soviet documents. The article deals with the characteristic of the “vostochninkis`” social position in the Western Belorussia in 1939-1941: they approximate total number and national structure, qualification, their social position in the Western Belorussian society and the relationship with the local population. The author concludes: although according to the government's plan, the sent Soviet clerks were expected to become the main implementers of the Sovietization policy in the annexed territory, their effort in this sphere turned out to be ineffective because of their desire of self-enrichment and leading an indecent life-style.
The significance of memoir complex associated with the large Russian historians of the XX century, as an important historical source.