Czechoslovakia
By 1948 pro-Soviet communists got the power finally and declared the Czechoslovak Socialist Republic.  It was a member of Warsaw Treaty Organization and COMECON , one of the richest countries of the Eastern Bloc.  In thePrague Spring of the late 1960s, Czechoslovak leader Alexander Dubcek pursued his own policy of a ‘socialism with a human face’.  In 1968 Warsaw Pact troops invaded Czechoslovakia to restore the old system.