100 Million Years B.C. – Earliest confirmation of King Kai’s existence.

50 Million Years B.C. – The Earth becomes aware.

100 Thousand Years B.C. – The Earth gives birth to a human child and names him Kan. He became the first Guardian of the Earth.

Ten Thousand Years B.C. – Kan falls in love with a mortal woman named Eka. Kan asked the Earth to make Eka immortal but she couldn’t. So instead, Kan asked to be made mortal. The Earth reluctantly granted his request. Kan and Eka had many children, whose descendants became a race of humans called the Shizen. They alone could speak with the Earth and choose the next Guardian of the Earth. The guardian became mainly a lookout who chose the four Chi, warriors trained to protect life using the Earth’s power.

238 B.C. – The Super Saiyan from Saiyan legend appears. Death and destruction shake up the universe. The Planet Saiyasei is destroyed.

261 A.D. – An ecological disaster occurs on Planet Namek. Katattsu’s son, Piccolo, escapes in a stolen spaceship. He makes an emergency landing on Earth.

430 A.D. – Master Roshi is born.

430 A.D. – Piccolo becomes the apprentice of the current Earth Guardian.

448 A.D. – The martial artist Mutaito undertakes Roshi as his pupil.

461 A.D. – The demon Garlic wipes out the Shizen people and then assaults the current Guardian. Both die. Piccolo, renamed Kami, takes his place after expelling all evil from his body. That evil becomes Piccolo Daimioh, the Demon King. He is sealed in a rice cooker by Mutaito’s Mufaba technique. Mutaito dies afterwards. Kami never learns of the Shizen people or of the Earth’s awareness. The former guardian swore Mr. Popo to secrecy.

550 A.D. – The Saiyan survivors drift ashore on the Planet Plant.

598 A.D. – Mr. Popo discovers a baby and finding the mark of Earth’s Blood upon her forehead, he knows she is the Earth’s daughter. He names her Kyloa, which means "the only one" in the Shizen language.

621 A.D. – King Kold visits Earth and discovers the secret of human DNA. He captures Kyloa and forces her to have his child. Queen Frozena discovers his transgression and sets out to destroy the whole Earth in her rage. With Kami’s help, Kyloa, empowered by the Earth, sealed her in a rose. Kyloa dies afterwards from her wounds. King Kold escaped with the rose and the baby, who grew up to become Frieza. The Earth absorbed Kyloa’s body and erased everyone’s memories, including Kami’s, of Queen Frozena.

622 A.D. – Kyloa is reborn in the spring by the Earth, with her memory intact. She becomes a recluse, shunning all but the Earth and wildlife.

650 A.D. – The first World’s Martial Arts Tournament takes place.

658 A.D. – Son Gohan is born. In the future, he becomes the first pupil of Master Roshi. The Ox King is the second.

720-730 A.D. – On the Planet Plant, the alien Saiyan unite and wipe out the native inhabitants. They rename it Planet Vegeta, after their warlord.

731 A.D. – The Saiyan begin relations with Frieza and start selling conquered planets.

732 A.D. – Prince Vegeta, King Vegeta’s son, is born.

733 A.D. – Bulma, Yamcha, and Tien are born.

736 A.D. – Krillin is born.

737 A.D. – Kakarott (Goku), Bardock’s son, is born. He is sent away to conquer Earth. King Vegeta’s rebellion against Frieza ends in failure and the king is murdered while trying to rescue his son. Bardock is killed in battle against Frieza. Frieza destroys Planet Vegeta. Chichi, the Ox King’s daughter, is born. Her mother dies of illness. Later that year, old Gohan discovers baby Kakarott and names him Goku. Months later, Goku hits his head and changes from a Saiyan terror to a cheerful boy.

740 A.D. – Oolong is born. Krillin begins his apprenticeship in the Oorin Temple.

749 A.D. – Goku meets Bulma and joins in her quest for Dragonballs. Along the way they meet Oolong, Yamcha, Paur, Chichi, the Ox King, and Master Roshi. Later that year, Master Roshi takes Goku and Krillin as his pupils.

750 A.D. – Goku defeats the Red Ribbon Army. Dr. Gero vows revenge.

753 A.D. – Piccolo Daimioh escapes and is defeated by Goku. Before dying, the Demon King lays an egg. It hatches and out comes the present Piccolo. Goku also meets Tien and Chaotzu.

From 753 A.D. – 756 A.D. – Goku trains under Kami, the Guardian of the Earth. Before he left for Kami’s lookout, he secretly trained under Kyloa to become a Chi. The Earth erased his memories of that time.

756 A.D. – Goku wins the World’s Martial Arts Tournament for the first time. That same year, Goku and Chichi are married.

757 A.D. – Gohan, son of Goku & Chichi, is born.

761 A.D. – Goku and Gohan fight Garlic Jr., the demon Garlic’s son. Radditz arrives on Earth. Piccolo sides with Goku to defeat him. Both Radditz and Goku are killed. Piccolo takes Gohan as his student.

762 A.D. – Vegeta and Nappa arrive on Earth. Goku is wished back to life. Goku and the other Z fighters defeat Vegeta and Nappa. Gohan, Krillin, and Bulma travel to the planet Namek to borrow their Dragonballs. There they meet Frieza. Goku arrives, transforms into a Super Saiyan, and defeats Frieza. The planet Namek is destroyed. Months later, the Nameks evacuated to Earth are wished to a new planet, New Namek.

763 A.D. – After 5,000 years, the Makyou star approaches Earth again. The reborn Garlic Jr. is defeated again by Gohan.

764 A.D. – Frieza’s body is rebuilt and he and King Kold go to Earth intent on killing Goku and his friends. Mirai Trunks kills them both before they get a chance. Goku returns home and Mirai Trunks warns him of Dr. Gero’s androids. The Z fighters begin training in preparation.

765 A.D. – Cooler, Frieza’s brother, arrives on Earth and is defeated by Goku.

766 A.D. – Trunks, son of Vegeta & Bulma, is born.

767 A.D. – The Androids arrive. Piccolo and Kami fuse. Cell appears and absorbs the androids. Dende becomes the new guardian. Goku dies trying to defeat Cell. Gohan destroys Cell. The great wrestler Hercule takes credit for defeating Cell and becomes a world hero. Goten, second son of Goku & Chichi, is born later in the year.

768 A.D. – Bulma finally completes rebuilding Android 16 with help from Dr. Briefs.

771 A.D. – Marron, daughter of Krillin & Android 18, is born.

773 A.D. – Bulma conducts experiments with human DNA and alien DNA and discovers that when human DNA is mixed with another species DNA, whether Saiyan or other, the offspring produced are much more powerful then both species on their own. It is unique only to human DNA. Bulma also discovers a puzzling fact: Frieza was half-human. Startled by this discovery, Bulma decides to keep it a secret.

774 A.D. – Gohan begins attending Orange High School and meets Videl, the daughter of Hercule. Queen Frozena escapes from the rose and sensing it, the Earth shudders in fear. Frozena begins heading towards Earth. Mr. Popo is forced into revealing to the Z fighters that the Earth is alive and that she has a daughter named Kyloa. The Z fighters meet Kyloa and force her into revealing the past about Queen Frozena and Frieza. But she doesn’t reveal who Frieza’s human mother is. Kyloa also reveals that Goku was chosen as a Chi warrior long ago, but it was erased from his memory. As his oldest offspring, Gohan is also Chi. But for the upcoming fight against Queen Frozena, four Chi warriors are needed, so Kyloa forces Piccolo, Vegeta, Krillin, Eighteen, and Sixteen into apprenticeship. After long work, the Earth chose Piccolo and Android 16 as Chi. She didn’t trust Vegeta; Krillin was not strong enough; and Eighteen was not a big nature lover. As acceptance of this position, Piccolo and Sixteen willing die and are resurrected by the Earth. When they return, Piccolo discovers that the Earth has changed his physiology, giving him genitalia. Sixteen has also been changed, becoming part human, like Eighteen. So training as Chi began for Goku, Gohan, Piccolo, and Sixteen.

775 A.D. – Queen Frozena arrives. The power given to Goku, Gohan, Piccolo, and Sixteen isn’t enough. Fusion is the only option left. Goku is killed. Kyloa, as the only Shizen left, is forced to take his place in the fusion. The fused fighters destroy Queen Frozena but Kyloa dies after the fusion ends. Her body couldn’t handle it.

776 A.D. – Kyloa is reborn in the spring by the Earth. Piccolo discovers this fact and searches her out. Finding her, he confesses his feelings and they are married. Kyloa is renamed Kya by Mr. Popo, which in the Shizen language means "the first one."