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Symbols · Laws Teachings · Literature Calendar · Divisions Pilgrimage A pioneer is a volunteer Bahá'í who leaves his or her home to journey to another place (often another country) for the purpose of teaching the Bahá'í Faith. The act of so moving is termed pioneering. Bahá'ís refrain from using the term "missionary".
During the Ten Year Crusade which ran from 1953 to 1963, hundreds of pioneers settled in countries and territories throughout the world, which eventually led to the establishment of 44 new National and Regional Spiritual Assemblies and the increase in the Bahá'í population.

Teaching versus proselytization
For Bahá'ís, pioneering refers to something similar to missionary work. However, Bahá'ís do not consider pioneering to be proselytism, a word which often has negative associations with coercive Christian missionaries.
"Care, however, should, at all times, be exercised, lest in their eagerness to further the international interests of the Faith they frustrate their purpose, and turn away, through any act that might be misconstrued as an attempt to proselytize and bring undue pressure upon them, those whom they wish to win over to their Cause."