An NKVD team assassinated him on 4 September 1937 near Lausanne, Switzerland, a few weeks after he declared his defection in a letter addressed to Joseph Stalin. The KPRP adhered russian wife you up traduction to the policies of Rosa Luxemburg.

By the summer of 1919, he had received a summons to Vienna, Austria, where he moved quickly from work with agencies of the newly formed Comintern to “Fourth Department of the General Staff”—which became the Soviet GRU. He then conducted party work in Poland. During the Russian-Polish War in 1920, Willy Stahl and he received their first assignment, Lwow, where they distributed illegal Bolshevik literature. From 1921 to 1929, Reiss served in Western Europe, particularly Berlin and Vienna.