"Marshall Plan Aid was rejected by the Soviet Union as a form of economic imperialism. This aid certainly represented a demonstration of American strength that could serve to create links. This rejection created a new boundary line: between the areas that received such aid and those that did not. The Soviets, meanwhile, alongside establishing and monitoring Communist governments in individual states, moved to consolidate their bloc and to advance its interests. One step was the creation, in September 1947, of the Cominform, the Communist Information Bureau, a recrudescence of the Comintern, which brought together European Communist parties under Soviet guidance. The existence of ‘two camps’ was announced by Andrei Zhdanov, Stalin’s key ideological adviser, who chaired the first meeting."
January 1, 1970
https://en.wikiquote.org/wiki/Andrei_Zhdanov