Where and when was ADF started?

ADF came together in 1983, when the people interested in researching an Indo-European druidic path, decided that what they were finding was worthwhile enough to be spread across the US.  According to Isaac, the first ritual in ADF format was held on Samhain of 1983 in Berkeley California.  The organizational structure on which they settled was based loosely on that formed by the Reformed Druids of North America.  Isaac had been ordained a priest by that group in 1969, and was familiar with its structure.