The term prehistory (100,000,000 BA — 1,000 BA) refers to all of the events that took place prior to the beginning of established Dragon Ball content.
- Unknown Time BA — Majin Bū first appears and begins a cycle of destruction and hibernation.
- 100,000,000 BA — The Kaiō are confirmed to exist.
- 75, 000,000 BA — The Hakaishin Beerus seals Old Kaiōshin away in the Z Sword.
- 5,000,000 BA — Bibidi summons Majin Bū and begins a rampage across the universe. This rampage sees the deaths of four of the five Kaiōshin. Bū is eventually sealed away in a ball by Bibidi and placed on Earth. East Kaiōshin then defeats Bibidi.
- Approx. 10,000 BA — An'nin begins managing the Furnace of Eight Trigrams at the Mountain of Five Elements on the border of the Other World and the living world.(Anime only)
- Approx. 1,000 BA — According to Saiyan legend, a Super Saiyan appears.
- 5,000,000 BA
- Prehistory on Wikipedia.