Rajguru Aggavamsa Mahathera was one of the delegates from Bangladesh) in the Sixth Buddhist council held in Yangon, Burma in 1956.
[1]: 52 He renounced his home, wife, son and daughter and took ordination at the Lord Abbot of Bawgaltali Buddhist temple, Venerable Tissa Mahathera during the full moon day of Vesakha in 1939.
[1]: 53 In the year 1947 on 15 June he came to Rangoon (Yangon), Myanmar for higher education of Buddhist Literature and to learn meditation.
He had given the name Sadhana Nanda at the time of Upasampada to most renowned Buddhist Monk Sadhanananda Mahathera popularly known as VANA BHANTE.
He re-established Kathina Civara Dana Ceremony, Buddha Puja, in a manner followed by the ancient Buddhist and continued efforts a great social and religious revival took place in the Chittagong Hill Tracts.
[1]: 54 He wrote some dozen books on Buddhism,[1]: 54 namely: He has been honoured as “Tipitaka Visaradha” by the Sangha Raja Bhikkhu Mahasabha of Chittagong.
He was appointed as a visiting professor of Pali literature, and also as an external examiner of PhD thesis of the Calcutta University.
Both together with the association of eminent Chakma living in Kolkata founded the great institution “Shishu Koruna Sangha” in the year 1986.
He also the founder of Shisu Karuna Sangha(Bodhicariya) with his disciple Venerable Vimal Tissa in Kolkata, India.
Prajananda Mahathera, the Lord Abbot of Shakkya Muni Buddha Vihar, Dhaka extended all necessary assistance.
In the year 1982 he had attended human Rights Conference in the Netherlands and presented his speech on the inhuman torture by the military to the mass tribal people of Chittagong Hill Tracts.
He was invited by the United Nations Economic and Social Council, Geneva on 29 July- 2 August 1985, Commission on Human Rights on Minorities Working Group on Indigenous people.
He visited United Kingdom, Germany, Netherlands, Switzerland, France, Thailand, Sri Lanka, Nepal and many other countries, and preached humanity, international brotherhood and world peace.