▁South ▁Vietnam ▁President ▁N go ▁Din h ▁D iem ' s ▁ref us al ▁to ▁permit ▁all - V ietnam ▁elections ▁in ▁ 1 9 5 6 ▁as ▁st ip ulated ▁in ▁the ▁Gene va ▁Acc ords , ▁the ▁ide olog ically ▁anti - comm un ist ▁United ▁States ▁supported ▁South ▁Vietnam ▁with ▁mater iel ▁in ▁a ▁Cold ▁War ▁proxy ▁war ▁and ▁by ▁degrees ▁allowed ▁itself ▁to ▁be ▁drawn ▁into ▁South ▁Vietnam ' s ▁losing ▁struggle ▁against ▁commun ist ▁North ▁Vietnam ▁and ▁the ▁V iet ▁Cong ▁acting ▁in ▁South ▁Vietnam . ▁Ult imately , ▁following ▁the ▁defeat ▁of ▁South ▁Vietnam ▁and ▁the ▁United ▁States , ▁the ▁US ' s ▁gover ning ▁belief ▁that ▁South ▁Vietnam ' s ▁defeat ▁would ▁result ▁in ▁all ▁of ▁remaining ▁Main land ▁S out heast ▁Asia ▁" going ▁commun ist " ▁( as ▁proc laimed ▁by ▁the ▁US ' s ▁" dom ino ▁theory "), ▁proved ▁err one ous . ▁ ▁K ond rat iev ▁waves ▁▁ ▁In ▁econom ics , ▁K ond rat iev ▁waves ▁( also ▁called ▁super cy cles , ▁great ▁sur ges , ▁long ▁waves , ▁K - w aves ▁or ▁the ▁long ▁economic ▁cycle ) ▁are ▁hypoth es ized ▁cycle - like ▁phen omena ▁in ▁the ▁modern ▁world ▁economy . ▁ ▁It ▁is ▁stated ▁that ▁the ▁period ▁of ▁a ▁wave ▁ranges ▁from ▁forty ▁to ▁si xty ▁years , ▁the ▁cycles ▁consist ▁of ▁altern ating ▁intervals ▁of ▁high ▁sector al ▁growth ▁and ▁intervals ▁of ▁relatively ▁slow ▁growth . ▁ ▁Sec ular ▁cycles ▁theory ▁▁ ▁Rec