From its emergence in southern Vietnam in 1926, Caodaism moved quickly from a series of spirit revelations to a highly organized religious community. A formal hierarchy and temple system were established, scriptures and rituals were codified, and the movement expanded rapidly, reaching a very large following within a few decades. This early phase also saw the consolidation of a distinctive syncretic theology and liturgy, drawing together multiple religious currents under the authority of the Supreme Being, Cao Đài. The institutional structure, with its carefully ordered ranks, gave the new faith both stability and a recognizable public presence.

As Caodaism grew, it became deeply entangled with the political and military struggles that marked Vietnam’s mid‑twentieth‑century history. Caodaist organizations developed armed forces, participated in independence movements, and were drawn into conflicts among competing political factions. This involvement brought both influence and vulnerability, as religious leadership had to navigate shifting alliances and pressures. After the change of regime in Vietnam, the movement experienced suppression: temples were closed, leaders were persecuted, and religious activities were sharply curtailed. In this period, the faith’s public profile diminished, yet its inner devotional life and memory of earlier revelations continued to sustain adherents.

A significant transformation occurred as many followers left Vietnam and formed diaspora communities in places such as the United States, Canada, Australia, and other countries. In these new settings, Caodaism adapted its organizational forms and ritual life to different cultural contexts while preserving its core syncretic vision. Overseas temples became centers not only of worship but also of cultural continuity, allowing the tradition to endure beyond its original homeland. The existence of multiple communities, both within and outside Vietnam, encouraged reflection on how to articulate Caodaist teachings in diverse environments without losing their distinctive character.

Within Vietnam, a gradual relaxation of state restrictions allowed a measured revival of Caodaist practice. Some temples, including major centers of worship, were restored, and communal religious life regained a degree of visibility. The movement’s emphasis shifted away from overt political engagement toward worship, moral cultivation, and community service, aligning more clearly with its spiritual rather than military heritage. Across both homeland and diaspora, Caodaism has shown a capacity to maintain its foundational mission of religious unity while adjusting its institutional life and public role to changing historical circumstances.