the eastern bloc was the group of socialist countries led by the soviet union. the warsaw pact was an alliance created in 1955 and included the ussr, albania, bulgaria, czechoslovakia, east germany, hungary (until 1976), poland, and romania. other countries allied with the eastern bloc included angola (1975–1991), cuba, bolivia, cambodia (1977–1979), south yemen, tunisia, nepal, bhutan, libya (1974–1991), mongolia (1976–1988), jamaica, north korea, china and laos (1975–1991).