On 23 August 1939, in Moscow, a Nonaggression Pact was signed between the Nazi Germany and the Soviet Union as well as an additional secret Protocol. These documents represent a propaganda tool of the two totalitarian regimes that aimed to deceive the entire world. During six previous years, soviet propaganda presented Hitler’s Germany as one of the main enemies of the Soviet Union. After 23 August 1939, suddenly, USSR started protecting Hitlerism as an ideology, which was not only unnecessary and incomprehensible, but also extremely prejudicial for the Soviet Union itself. Soviet propaganda, which tried to justify the signing of the Nonaggression German - Soviet Pact by misleading the population of the Soviet Union and the world public opinion, ended along with the attack of the Nazi Germany on the Soviet Union, on 22 June 1941.