1917 1988-1993 1990 1991 1991(sovietuni 20thcentury 20thcenturyamericanhistory afghanipolitics afghanistan armedforces balticcountries biography coldwar communism communismbyregion communistparties communists diplomaticrelations dissent easterneurope economicas economicaspects economicconditionsineurope economicpoliciesineurope europe f formersovietrepublics formersovietunion formersovietunion- general generalasianpolitics germanhistory germany go gove govern government history internationalrelations islam khrushchevera leadership macroeconomics militaryconflicts militarypolicy miscellaneous miscellaneoushistory miscellaneousmilitaryhistory movements nationalism north participation philosophicalpositions pluralismindemocracies po politi politicalbiography politicalprotest politics post-communism present relations russia socialaspects socialism socialists sociology southkorea sovereignty soviethistory sovietmilitaryhistory sovietunion vi vietnamwar