The ASEAN Regional Forum was established in the year 1994. Let's understand the details about the establishment of the forum:

ASEAN Regional Forum (ARF)
- The ASEAN Regional Forum (ARF) is a forum for dialogue and consultation on political and security issues in the Asia-Pacific region.
- It was established in 1994 as a platform for ASEAN and its dialogue partners to discuss security issues and promote regional cooperation.
- The ARF has 27 members, including ASEAN member states, Australia, Canada, China, the European Union, India, Japan, North Korea, South Korea, Mongolia, New Zealand, Pakistan, Papua New Guinea, Russia, Timor-Leste, the United States, and Bangladesh (as of 2021).
- The ARF operates on the basis of consensus and focuses on preventive diplomacy, confidence-building measures, and conflict resolution.
- The ARF also encourages the participation of civil society organizations in its activities.

Establishment of ARF
- The establishment of the ARF can be traced back to the ASEAN Post-Ministerial Conference (PMC) meetings, which were first held in 1978.
- In 1992, at the 25th ASEAN Ministerial Meeting (AMM) in Kuala Lumpur, ASEAN proposed the creation of an Asia-Pacific regional forum for political and security issues.
- The proposal was welcomed by ASEAN's dialogue partners, and in 1993, the ASEAN Regional Forum concept was formally endorsed at the 26th AMM in Singapore.
- The ARF was officially launched at the 27th AMM in Bangkok, Thailand, in July 1994.

In conclusion, the ASEAN Regional Forum was established in the year 1994 as a platform for ASEAN and its dialogue partners to discuss security issues and promote regional cooperation.