Rubuta ci gaba don wannan sakin layi - Vietnam ta ba da izini a 1978, neman taimakon tattalin arziki don tallafawa Shirin Shekaru Biyar na Biyu. A cikin 1978 Lê Duẩn da Phạm Văn Đồng sun rattaba hannu kan Yarjejeniyar abota da Hadin Kai na shekaru 25 tare da USSR. A karkashin kariyar Soviet, Vietnam ta mamaye Kampuchea
Ka yi haƙuri. A matsayin martani China ta mamaye Vietnam. Vietnam ta ba da hayar sansanoni da yawa ga Tarayyar Soviet don kare yankinta daga China. An yi jita-jita cewa daya daga cikin bukatun kasar Sin na zaman lafiya shi ne kawo karshen taimakon Soviet ga Vietnam. A Asiya Vietnam ta taka rawar da ta yi kama da Cuba a Latin Amurka: ta goyi bayan kungiyoyin juyin juya hali na gida kuma ita ce hedkwatar kwaminisanci irin na Soviet. Vietnam ta goyi bayan mamayewar Soviet na Afghanistan kuma ta karɓi dala miliyan 3 a rana a matsayin taimakon soja.