There are a couple of different possible approaches you might take. In oral traditional cultures, historical information and other important cultural traditions are shaped into narrative form and performed. In such cultures, there is no real distinction between history and legend. Both are fused together as narratives of the past that can serve as guidelines for behavior.The second possible approach is sometimes called "euhemerism", named after Euhemerus, a fourth century B.C. Greek who believed that all legends are actually distorted accounts of actual historical accounts.