Dagaro is a campaign setting designed for use with original edition D&D.
Part One describes the world, Dagaro, three of its nations, technology, inhabitants and uncivilized regions. The material in Part One is effectively systemless and it could be used with any set of rules for fantasy gaming.
Part Two describes new versions of alternate classes and rules for use with original edition D&D: the Abbott, the Barbarian, and the Ranger are described along with their special abilities.
A short adventure, Temple of the Cat, a one-level dungeon is included. It is set in Dagaro but could be adapted for use in any campaign.