Career
Preceded by Boris Shtein, Assmus was an ambassador in Finland from 1935 to 1937. He contacted the Finnish prime minister Toivo Kivimäki on 15 June 1935 stating that "in case of a military conflict in the Mainland Europe, the Soviet Union could be forced to occupy some parts of Finland". Later on 10 February 1936 Kivimäki told his private conversation with Assmus to J.K. Paasikivi, where he told:
After Assmus departed Helsinki, he was arrested and executed by the People’s Commissariat of Internal Affairs during the Great Terror.
In 1938, a People’s Commissariat of Internal Affairs agent Boris Yartsev started negotiations between Finland and the Soviet Union.