<Li> Somalia (1969--1991) - Supreme Revolutionary Council (1969 - 1976), Somali Revolutionary Socialist Party (1976 - 1991) </Li> <Li> Soviet Union (1922--1991) - Communist Party of the Soviet Union (known from 1918 to 1925 as the Russian Communist Party (Bolsheviks) and from 1925 to 1952 as the All - Union Communist Party (Bolsheviks) banned after the failed 1991 Soviet coup d'ètat attempt) </Li> <Li> South Yemen (1967--1990) - Yemeni Socialist Party (known from 1963 to 1978 as National Liberation Front) abandoned Marxism - Leninism for social democracy </Li> <Li> Yugoslavia (1945--1990) - League of Communists of Yugoslavia (known from 1919 to 1952 as the Communist Party of Yugoslavia) broken up into separate parties in each constituent republic which abandoned Marxism - Leninism - Titoism for social democracy </Li>

How did communist parties differ from democratic parties