hi! there have been several posts about oral history; I've collected a bunch to get you started

how far back

• How far back into "pre-history" does oral history stretch?

• Do oral histories exist of extinct pleistocene-era megafauna such as the wooly mammoth and ground sloth?

• Regarding the transmission and longevity of oral traditions

a few more examples

• Do the Maori people have oral histories describing their arrival in New Zealand?

• Do any Native American/First Nations peoples have any oral traditions or tales about the Vikings?

further reading

• Theory Thursday | Non-Textual Sources (I'm talking to you, archaeologists, oral historians, and others)

• /u/AskAnthropology AMA: I'm an anthropologist turned oral historian, AMA!

• How accurate is oral history?

• How useful is "Oral History"?

• Overall, how reliable is oral tradition?

• How do historians verify the validity or accuracy of oral histories?