Spain - Partido Socialista Obrero Español (Rafael Estrella, Federal Committee Member, Senator) Sri Lanka - Communist Party of Sri Lanka (Merenna Gawlias Mendis, PB) Sudan - Sudanese Communist Party Sweden - Arbetarpartiet Kommunisterna (Rolf Hagel, President) Sweden - Vänsterpartiet Kommunisterna (Bertil Måbrink, Vice-President) Switzerland - Partei der Arbeit der Schweiz (Hansjörg Hofer, PB) Switzerland - Sozialdemokratische Partei der Schweiz (Peter Vollmer, Vice-President) Syria - Arab Socialist Ba'ath Party (Dr. Suleiman Kaddah, Vice Regional Secretary) Syria - Syrian Communist Party (Khaled Hammami, PB) Tanzania - Chama Cha Mapinduzi (Paul Sozigwa, CC, National Executive Committee) Tunisia - Parti Communiste Tunisien (Abdelhamid Ben Mustapha, PB, CCS) Tunisia - Parti Socialiste Destorien (Slaheddine Ben M'barak, PB) Turkey - Türkiye Komünist Partisi (Haydar Kutlu, General Secretary) Uruguay - Partido Comunista del Uruguay (Alberto Altesor, EC, CCS) Uruguay - Partido Socialista (Ernesto de los Campos) United States - Communist Party USA (James West, PB) Venezuela - Partido Comunista de Venezuela (Alonso Ojeda, General Secretary) West Berlin - Sozialistische Einheitspartei Westberlins (Horst Schmitt, President) West Germany - Deutsche Kommunistische Partei (Herbert Mies, President) West Germany - Sozialdemokratische Partei Deutschlands (Dr. Wilhelm Bruns, Chief of International Department of Friedrich Ebert Stiftung) Vietnam - Communist Party of Vietnam (Chu Huy Mân, PB) Yugoslavia - Savez Komunista Jugoslavije (Jure Bilić, Presidium of CC) Zambia - United National Independence Party (Daniel Muchiwa Lisulo, CC) The Magazine "Problems of Peace and Socialism" (Gancho Ganev) And other delegations of illegal parties participated. The General People's Congress of Libya could not attend due to the American military intervention at home. Abbreviations: CC: Central Committee CCS: Secretary of the Central Committee CEC: Central Executive Committee MP: Member of Parliament PB: Politburo Member PC: Political Commission 1986 in East Germany Socialist Unity Party of Germany