Timeline of Events
180th Century BCE	The Moon Kingdom falls in an attack led by Beryl and her allies in the Sun Kingdom, including Vandar Adg. A telepathic plague spreads through the Martian species, causing a racial phobia of fire. Following the lead of several other deities, the entity known as Washū incarnates into a physical body.
160th Century BCE	Remnants of the Moon Kingdom led by a Bear Tribe member named Arqțas found a fortress that would come to be known as the first cyclic occurence of Camelot. Ystin of the Dog Tribe is born during this period.
140th Century BCE	Camelot falls. Fleeing, Ystin and several other survivors travel the warming world, integrating into other developing human societies. The magi Calculha and Majistra found a fastness that would come to be known as Atlantis.
76th Century BCE	Rising sea levels combine with a catastrophic event to sink Atlantis. Many of the survivors adapt to underwater living, rather than abandon their civilization; others travel outward into the world, introducing the cultivation of wheat and barley in what is now Iraq.
26th Century BCE	Teth-Adam of the Kahndaqi is born, and granted the power of SHAZAM by the wizard Mamaragan.
1st Century CE	The mystical artifact known as the Starheart crashes in China in the form of a meteorite, and is reshaped into a lantern. It would eventually come to be the power source of Alan Scott, the first public figure known on Earth as a Green Lantern.
6th Century CE	A man who would come to be known as Jason Blood is born and becomes host to the demon Etrigan during the fall of the latest cyclical occurence of Camelot.
11th Century CE	Ystin, the Amazon exile known only as Exoristos, the demon Etrigan, the sorceress Madame Xanadu, and Vandar Adg (by this point known as Vandal Savage) meet, and form a team together with the mathematician and inventor Al Jabr, and the warrior known as Horsewoman. This team and its internal conflicts would come to form the basis for several later organizations.
1520 CE	Damian Wayne, Jonathan Kent, and Rini Osaka are sent back to this time period, encountering Vandal Savage and the sorcerer Felix Faust as a result of a ploy by Faust's apprentice Aurora to liberate herself and save the lives of heroes who would come to be threatened by her master's plans, similar to the events portrayed in the comic Challenge of the Super-Sons.
c.1550-1560	Inspired by reports from the sorceress Aurora of a time-traveling immortal Japanese girl, Ystin travels to Japan in search of answers about their quest for the Grail. They become embroiled in a conflict between yokai and monster-hunters similar to the events portrayed in the manga Inu-Yasha.
1662 CE	The Book of Old Gotham is written by Alienor Frych about the life and murder of her friend Amity Arkham, as portrayed in the comic Gotham Academy: Second Semester.
Late 18th Century CE	A wave of Japanese immigration to Alta California includes a group of humans and yokai accompanying Ystin in their travels, establishing the Nine-Tails Vale and the Hazakura Temple. Several of these individuals become notable as local heroes due to the impact of their powers and skills, including the rescue of settlers at Pueblo de los Ángeles from a devastating earthquake predicted by recent arrival Mai Fey, channeling the spirit of a distant ancestor.
1800s-1830s CE	As Los Angeles grows into a formal city, the influence of Japanese settlers impacts the form of its culture and legal system, blurring with the developing Mexican and American cultures of settlers travelling from the east.
1846 CE	The Bear Flag Revolt occurs, its leaders spurred on by divinations of the Fey matriarch. On admission into the United States of America, the new state of California retains the dominant legal system of the Japanese-influenced colonists.
1889 CE	Events occur similar to those portrayed in the anime Nadia: The Secret of Blue Water.
Late 19th Century	Violent criminal Cyrus Gold's body sinks into Slaughter Swamp outside of Gotham City, eventually resurrecting as the undead Solomon Grundy.
Current Era: Cycle of Heroes
For purposes of flexibility in storytelling, the period of the past four decades is not defined as taking place in a specific year; events are marked according to the matching Chinese Zodiac year. This shorthand is more widely recognized in-universe due to the strong impact of Japanese culture on the media landscape of California, and resulting film and television distribution.
Year of the Rat 1	Dick Grayson debuts as the first Robin.
Year of the Ox 1	The Justice League forms.
Year of the Tiger 1	The Teen Titans form.
Year of the Rabbit 1	Dick Grayson becomes Nightwing. Jason Todd becomes the second Robin.
Year of the Dragon 1	The Justice League's Watchtower base is established on the Earth's Moon, on the site of the former Moon Palace.
Year of the Snake 1	Kara Zor-El debuts as Supergirl.
Year of the Horse 1	Jason Todd is murdered by the Joker.
Year of the Goat 1	Establishment of Teen Titans West.
Year of the Monkey 1	Tim Drake debuts as the third Robin.
Year of the Rooster 1	A Gotham vigilante known only as 'Spoiler' becomes active.
Year of the Dog 1	The death and resurrection of Superman. Public debut of Citizen Moon, Azoth, Superboy, Steel, the Super-Man of China, Hyperion, Aquamarine, and Jon Kent. Copper of the Metal Men becomes "Guardian Venus". Stephanie Brown debuts as the fourth Robin. Cassandra Cain debuts as Batgirl. The supervillain Bane claims to have broken the Batman's spine; verified sightings of the hero drop off for the next few months. A series of devastating earthquakes tear across the globe, especially damaging normally tectonically-stable areas like Gotham City. A worldwide uptick in tragic and devastating events is eventually traced to a secret base in the South Pole, controlled by an organization known as the Dark Kingdom. A joint team of young heroes raids the Dark Kingdom base, undoing the organization's magical corruption by a Lord of Chaos known as Metalia. Formation of Young Justice. Earthshine Company LLC is established.
Year of the Boar 1	In response to the events of the prior year, the Justice League begins more actively recruiting new members. Shinobu debuts as Arashi's sidekick. Damian Wayne debuts as the fifth Robin. After a several months absence, Stephanie Brown debuts as a Batgirl at Cassandra Cain's side. Public debut of Lady Morrigan, Dryad, Agent Moon, Citizen Earth, and Citizen Saturn.
Year of the Rat 2	Kudō Shin'ichi disappears from the public eye. Debut of Edogawa Conan, the third Blue Beetle, and Green Lantern Tai Pham.
Year of the Ox 2	Current. Debut of Lilit, Suteki-Jō, and Dummy Doll.