Hungary: Hungarian Socialist Workers Party ( János Kádár, First Secretary of the Central Committee).East Germany: Socialist Unity Party of Germany ( Walter Ulbricht, First Secretary of the Central Committee).Czechoslovakia: Communist Party of Czechoslovakia ( Gustáv Husák, First Secretary of the Central Committee).Bulgaria: Bulgarian Communist Party ( Todor Zhivkov, First Secretary of the Central Committee).Participants in italics were from countries where the Communist Party was banned. Names of some underground parties were left out in official conference reports, and are thus not included here. The Italian, Sammarinese, Austrian and Reunionese delegations only signed one of the four parts of the document. The document on the Lenin birth centenary was passed unanimously, but the document on the alliances between communist parties and anti-imperialist forces was not signed by the Norwegian, Dominican and British delegations. On both issues, the conference passed a document. The two main points of discussion of the conference was the strategy of cooperation with anti-imperialist forces and the centenary celebrations of the birth of Lenin. Notably the Workers Party of Korea and the Workers Party of Vietnam, both cautious at the time to take a stand in the Sino-Soviet conflict, were absent. However the phenomenon of Eurocommunism had begun to emerge, which was notable amongst some of the delegations present. Pro-Chinese elements were absent from this event.

By this time the split between the two poles had been finalized.

The preceding international meeting, held in Moscow in 1960, had been dominated by disputes between the Communist Party of the Soviet Union on one hand and the Communist Party of China and the Party of Labour of Albania on the other. The meeting occurred in the aftermath of the Sino-Soviet split and the Soviet intervention in Czechoslovakia. On 5–17 June 1969, an International Meeting of Communist and Workers Parties was held in Moscow.

Victoria 2 communist flags