Historically, most Vietnamese have identified themselves with Buddhism, which originated in what is now southern Nepal around 530 B.C. as an offshoot of Hinduism. Its founder was Gautama, a prince who bridled at the formalism of Hinduism as it was being interpreted by the priestly caste of Brahmans. Gautama spent years meditating and wandering as an ascetic until he discovered the path of enlightenment to nirvana, the world of endless serenity in which one is freed from the cycle of birth, death, and rebirth. According to Buddhist thought, human salvation lies in discovering the "four noble truths"--that man is born to suffer in successive lives, that the cause of this suffering is man's craving for earthly pleasures and possessions, that the suffering ceases upon his deliverance from this craving, and that he achieves this deliverance by following "the noble eightfold path." The foundation of the Buddhist concept of morality and right behavior, the eightfold path, consists of right views, or sincerity in leading a religious life right intention, or honesty in judgment right speech, or sincerity in speech right conduct, or sincerity in work right livelihood, or sincerity in making a living right effort, or sincerity in aspiration right mindfulness, or sincerity in memory and right concentration, or sincerity in meditation.

Buddhism spread first from China to Vietnam's Red River Delta region in approximately the second century A.D., and then from India to the southern Mekong Delta area at some time between the third and the sixth centuries. The Chinese version, Mahayana Buddhism, became the faith of most Vietnamese, whereas the Indian version, Theravada (or Hinayana) Buddhism, was confined mostly to the southern delta region. The doctrinal distinction between the two consists of their differing views of Gautama Buddha: the Mahayana school teaches that Gautama was only one of many "enlightened ones" manifesting the fundamental divine power of the universe the Theravada school teaches that Gautama was the one-and-only enlightened one and the great teacher, but that he was not divine. The Mahayana sect holds further that laypersons can attain nirvana, whereas the Theravada school believes that only ordained monks and nuns can do so.

Few Vietnamese outside the clergy, however, are acquainted with Buddhism's elaborate cosmology. What appealed to them at the time it was introduced was Mahayana ritual and imagery. Mahayana ceremony easily conformed to indigenous Vietnamese beliefs, which combined folklore with Confucian and Taoist teachings, and Mahayana's "enlightened ones" were often venerated alongside various animist spirits.

Before the country was unified under communism, Buddhism enjoyed an autonomy from the state that was increasingly threatened once the communists gained power. For pragmatic reasons, however, the regime initially avoided overt hostility toward Buddhism or any other organized religion. Instead, it sought to separate real and potential collaborators from opponents by co-optation and control. For example, within months after winning the South, the communistfbc st regime set up a front called the Patriotic Buddhist Liaison Committee. The committee's purpose was to promote the idea that all patriotic Buddhists had a duty to participate in building a new society liberated for the first time from the shackles of feudal and neo-colonialist influences. The committee also tried to show that most Buddhists, leaders and followers alike, were indeed rallying behind the new regime and the liaison committee. This strategy attempted to thwart the power of the influential, independent groups of Buddhist clergy, particularly the Unified Buddhist Church of Vietnam, which had been a major pre-1975 critic of the Saigon government and of the roughly twenty Buddhist sects in Vietnam the most vocal in opposing the war.

Communists also pressured monks and nuns to lead a secular life, encouraging them to take part in productive agricultural labor or to become actively involved in the work of the Patriotic Buddhist Liaison Committee. For their refusal to collaborate, some prominent clerical leaders in the South were placed under house arrest or imprisoned, their pagodas were converted to public use, and their holdings were confiscated. Such activity closely paralleled communist actions against Buddhists in the North in the 1950s. In addition, the party prevented Buddhist organizations from training monks and nuns in schools that previously had been autonomous. In April 1980, a national committee of Buddhist groups throughout the country was formed by the government. The government-controlled Vietnam Buddhist Church was established in November 1981, and it emerged as the only officially sanctioned organization authorized to represent all Buddhist groups both at home and abroad.

As a result of communist policy, the observance of Buddhist ritual and practice was drastically reduced. A 1979 study of a Red River Delta commune, reported to be "overwhelmingly Catholic," disclosed that the commune's two pagodas were "maintained and frequented regularly by the faithful (the majority of whom were old women), especially on the Buddhist feast days." No monks or nuns had been observed, however, and the study went on to note that pagodas had been eliminated entirely in nearby Hanoi. In 1987 occasional reports suggested that the observance of Buddhist ritual continued in some remote areas.

The communist government's attitude toward Buddhism and other faiths being practiced remained one of tolerance as long as the clergy and faithful adhered strictly to official guidelines. These guidelines inhibited the growth of religious institutions, however, by restricting the number of institutions approved to train clergy and by preempting the time of potential candidates among the youth whose daily routine might require study, work, and participation in the activities of communist youth organizations. In an apparent effort to train a new generation of monks and nuns, the Vietnam Buddhist Church reportedly set up one Buddhist academy in Hanoi in November 1981 and another in Ho Chi Minh City in December 1984 . These academies, however, served as an arm of the state.

Data as of December 1987