Topics
Timeline 16
Era of the Dragon Lords
竜王の時代
Before tier magic appeared, dragons were the de facto rulers of the New World, and "magic" meant the "Wild Magic" used by Dragon Lords.
Six Great Gods
六大神
Six powerful beings who descended 600 years ago saved humanity from the brink of extinction and are worshipped by the Slane Theocracy as the Six Great Gods; they are all but certainly YGGDRASIL players (not stated outright).

Founding of the Slane Theocracy
スレイン法国建国
Humans saved by the Six Great Gods founded the Slane Theocracy around the Six Great Gods faith; it is the oldest human nation in the region.
Eight Greed Kings
八欲王
Eight players who descended 500 years ago. With overwhelming power they warred with the Dragon Lords, ruled the continent, and warped the world's laws of magic, until they destroyed one another out of greed for each other's possessions.
Events of 300 Years Ago
300年前の出来事
300 years ago the Deep Darkness Dragon Lord fought a YGGDRASIL player who had descended and "completely killed" him; around the same time the human nation of Gatenbarg fell through blind trust in [Message].

Kingdom Destroyer
国堕とし
About 250 years ago a girl of about twelve became a vampire through her talent, and her nation was destroyed as a result; feared as the legendary vampire "Landfall," she later became Evileye.
Evil Deities
魔神
About 200 years ago, demon-lord-like beings called "Evil Deities" (魔神) ravaged the world and nearly destroyed it, but were ultimately defeated or sealed by the Thirteen Heroes.
Thirteen Heroes
十三英雄
A multiracial band of heroes who defeated the Evil Deities about 200 years ago; immortalized in fairy tales, though they actually numbered far more than 13. Their Leader is presumed to have been a YGGDRASIL player.
Mouth-Only Sage
口だけの賢者
A figure who appeared as a minotaur about 200 years ago and is thought to have been a player. He proposed many concepts, such as refrigerators, electric fans, and surgery, but could neither make them nor explain how they worked, hence the name.
Founding of the Post-War Nations
王国・帝国・聖王国・評議国の建国
After the Evil Deities' upheaval subsided, one nation split into the Re-Estize Kingdom and the Baharuth Empire; the Roble Holy Kingdom and the Argland Council State were founded one after another; and the Slane Theocracy secretly created the Adventurer's Guild.
Theocracy–Elf War
法国とエルフの王国の戦争
Over a hundred years ago Elf King Decem deceived and violated Faine, a woman who was the Slane Theocracy's trump card, and the Black Scripture paid a terrible price to rescue her; the child born of this is the Extra Seat, and the two nations went from allies to prolonged war.

Recent History before the Story
近年の出来事
In the decades before the story begins, Ramposa III took the Kingdom's throne, Zurrernorn destroyed a city, and the Empire's "Bloody Emperor" ascended, while the regional balance gradually shifted toward the Kingdom's decline and the Empire's rise.

Transfer of Nazarick
ナザリックの転移
In June–July of the first year after the transfer, the Great Tomb of Nazarick appeared on the grasslands near the Kingdom's E-Rantel, and Ainz began intervening in the New World by saving Carne Village.

Massacre at Katze Plains
大虐殺/魔導国建国
In the winter of January–February of the second year after the transfer, Ainz joined the annual war on the Katze Plains at the Empire's invitation, massacred about 180,000 Kingdom soldiers with super-tier magic, took E-Rantel, and founded the Sorcerer Kingdom of Ainz Ooal Gown.

Jaldabaoth's Invasion of the Holy Kingdom
聖王国動乱
Demiurge, as Demon Emperor Jaldabaoth, led over a hundred thousand demi-humans of the Abelion Hills against the Roble Holy Kingdom, and then had the Sorcerer King "come to the rescue," in order to win faith and territory.

Fall of the Re-Estize Kingdom
王国滅亡/エルフの王国
Using the attack on its food convoy as a pretext, the Sorcerer Kingdom declared war on the Kingdom, took the Royal Capital and destroyed the Kingdom; Ainz then took the twins to the Elf Country, where the Elf King was killed by the Extra Seat, and Ainz decided to attack the Slane Theocracy.