Timeline of events in Digimon.arc

Below is a chronological list of events in Digimon.arc.

## -2000

### Date unknown

* The Digital World is created. In its infancy, it is a formless space inhabited by a single "being", the host computer Yggdrasil.
* Yggdrasil creates the first entity who could be classified as a Digimon. This entity was called "Human 0", and it was designed to study Human nature.
* Human 0 constructs the Digital World: Origin, the first iteration of the Digital World existing as a metaphysical space.
* Human 0 carefully constructed each Digimon species.
* Human 0 placed the world under the rule of the Four Digimon Sovereigns, but they quickly became tyrannical rulers, and Human 0 was recalled by Yggdrasil. A group of eleven powerful Digimon rose up to defeat them. Yggdrasil appointed them the "Royal Knights" of the Digital World.
* Human 0 (who had become extremely unstable in its search for information) was repurposed into a weapon called "Datalyss."
* At some point, Human 2 (more commonly known by the inhabitants of the Digital World as Homeostasis) is created to replace Human 0's role. Homeostasis was made without the flaws that led to Human 0's malfunction.

### 1994

* Bon attends Université Grenoble Alpes in Grenoble, France.

### 1996

* Bon becomes interested in the "digital world," a mysterious bit of software hypothesized to represent a metaphysical space by many computer scientists.

### 1997

* Bon and several computer scientists at Université Grenoble Alpes manage to crack open the Digital World for the first time in history. They discover the existence of Digimon, though their true nature is yet too complex for them to grasp.
* Bon receives her bachelors degree in Physics, and immediately begins her masters in Computer Science.

### 1999

* Bon discovers the *Bon particle* during her thesis. She and her research team transport themselves to the Digital World for the first time.

### 2000

* Bon's research is purchased for a premium by a small Japanese technology company called MIDGARD.
* Several members of the original research team are hired by MIDGARD as head technologists. Bon turns down the offer.

## 2001-2020

### 2001-2002

* MIDGARD begins building infrastructure in the Digital World.
* An in-development version of the "Digital Terminal System" is presented to private investors in France, Japan, and the United States.

### 2003

* A "Digital Hazard" is flagged by the Digital World's host computer Yggdrasil in response to MIDGARD's tampering with the Server Layer of the digital world It initiates *Project Ark,* and the X Program is released.
* The Royal Knights and the X Program begin to delete Digimon; the former in response to the appearance of an "X-antibody" which made certain powerful Digimon immune to the X Program. The X Program also targets man-made infrastructure.

### 2004

* Alarmed by the host computer's actions, Humans begin to create a "weapon" to hinder Yggdrasil. This takes the form of Apocalymon, who is a font of deleted Digimon data.
* An "Archive Layer" (the Dark Area) is created by MIDGARD rather hastily to collect this data.
* Apocalymon attacks Yggdrasil, halting the execution of Project Ark. The Royal Knights are unable to contact Yggdrasil for several months, and they only learn what has happened to it when LordKnightmon calls an emergency meeting.
* Yggdrasil is severely crippled, and it is currently incapable of giving cohesive orders to the Royal Knights. The duty falls to Datalyss; an entity designed by Yggdrasil to function as its protector in the event of a host computer failure, to administer duties to the Royal Knights.
* Confused by Datalyss' nonsensical messages, the Royal Knights hold a meeting.
* Apocalymon's data begins to rapidly degenerate, and the *Malice* virus begins to spread to Digimon.

### 2006

* A Digimon is brought into the real world for the first time.
* Several other Digimon are brought to the real world in Digi-tama form after the first successful attempt.

### 2007

* Arc Academy is founded with limited enrolment.

### 2008

* After many years of silence from Yggdrasil, MIDGARD opens the DTS 1.0 to the public.

### 2011-2013

* Malice leads to the creation of Project Einherjar, co-helmed by none other than Adeline Bon at the behest of MIDGARD's then president. A large group of researchers are sent to the Dark Area to study Digimon, while a secondary group travels to the Web Layer to collect Apocalymon's remains.
* In the Digital World, a powerful Digimon called Zeed Milleniummon wages war on the Upper Web Layer, seeking to wrest control of the Digital World from the Three Archangels. The Three Archangels barely escape the assault with their lives. The leader of the trio, Ofanimon, casts Seraphimon, Cherubimon, and a number of Holy-type Digimon down into the Dark Area to protect them.
* The Web Layer survey team documents the struggle for power taking place in the Digital World at the time.
* The Dark Area survey team documents the highly confidential "TASK-A" where they would go on to test the combat capabilities of thousands of Digimon species. The specifics of TASK-A were presumed destroyed when MIDGARD's board of directors decided that the information was too sensitive to risk a data-breach. The fruits of TASK-A, the "Digimon Reference Book" remains to the current day as the primary source of information on Digimon.
* At some point during TASK-A, BlackSeraphimon is discovered in the deepest parts of the Dark Area and is pitted against TASK-A's control. He is reverted to a Digi-tama.
* In 2013, Bon makes her final public appearance after announcing the release of the first edition of the Digimon Reference Book.

### 2014

* A mysterious "Gate" opens near a military base in Spain. Feral Digimon enter the real world, infected by Malice.
* Gates begin popping up all across the world.
* Human weaponry proves to be ineffective against Digimon even on "home turf."

### 2015

* A group of four Chosen Children appear at then-named Arc Academy America (Currently known as Arc Academy West). These students are marked by their partner Digimon "choosing" them and retaining memories from their life before being turned back into a Digi-tama.
* Ofanimon is reverted to a Digi-tama after losing yet again to Zeed Milleniummon. She is collected by humans, ends up at the nursery of Arc Academy America, and soon hatches in response to a young boy.
* Ofanimon (now Nyaromon) tells the humans that the Chosen Children are the will of Homeostasis (whom she and the other Archangels can communicate with, unlike regular Digimon).
* The American Chosen children and their partners are able to defeat Zeed Milleniummon, though Ofanimon's partner loses his life in the process. Ofanimon returns to the Digital World to act as an arbiter once more.
* Datalyss absorbs the remains of Ofanimon's partner.

### 2016

* Lucemon, one of the Royal Knights, goes AWOL after the Royal Knights receive a nonsensical message from Datalyss, and he learns of Datalyss' true nature.
* Lucemon, changed by the revelations Datalyss gave him, hides this information from the other Royal Knights. He enters the Dark Area to confirm his own suspicions, and meets Baalmon; a digimon who was extensively experimented on during TASK A.
* Lucemon rebels against the Royal Knights, and they subdue him and lock him away in a maximum security gaol in the server layer called Pandaemonium.

### 2017

* The first tamer society is formed, and tamer "licenses" are instated worldwide.

## 2021-2051

### 2021

* To mitigate the threat posed by Gates, MIDGARD creates EBEmon, a Digimon with an ability to revert Digimon to Digi-tama, much like Apocalymon. MIDGARD technicians during this period are accompanied by EBEmon.

### 2033

* EBEmon's unsophisticated AI quickly becomes out of control, entering Gates to target innocents.
* Two chosen children from Japan fight the EBEmon.
* Private investigations on the cause of this disaster are done, and it is revealed that the EBEmon did not contract Malice as first suspected. Instead, the entity known as Human 0 give them false orders, causing them to go haywire.

### 2034

* A slowly recovering Yggdrasil suddenly springs to life and Datalyss goes quiet.
* Lucemon and five other powerful demon Digimon escape Pandaemonium.
* The DTS crashes for several months, causing widespread panic.

### 2035

* Einherjars enter the Digital World through gates to try and restore order.
* The DTS is brought back online, now with measures against interference from forces without; a "firewall" by some descriptions.
* Several Einherjars who were in the Digital World during the crash are found dead. Their bodies are partially degenerated, but enough is left for surveyors to conclude that they were violently attacked.
* The Seven Demon Lords take control of the Digital World. Lucemon, with his immense power, now has Datalyss partially under his control. He uses it to destroy most of the Royal Knights. The remaining Royal Knights go into hiding.
* Several of the Royal Knights' Digi-tama are retrieved by MIDGARD.

### 2038

* A young Yamashiro Mashiro becomes the CEO of MIDGARD. He turns his efforts on expanding the DTS' sphere of operation.
* Yamashiro's aggressive expansion causes instability in the Server Layer, and Pandaemonium appears in the Web Layer. Lucemon takes command of many of the Digimon who were kept in Pandaemonium.

### 2041

* Alphamon comes out of hiding to have an audience with the Einherjars. Alphamon insists that Project Ark must be executed, even if it means that everything must be reset. Yggdrasil is ailing still from Apocalymon's attack 35 years prior, and Alphamon knew the humans were responsible. He scoffs at the proposal of creating a new host computer, and when Yamashiro begins to speculate wildly on the idea, he responds with hostility.
* Alphamon is subdued, and his data is extensively copied.
* Yamashiro orders that MIDGARD begin deciphering Strange (the coding language the Digital World is written in). Bon is asked to help with this, but she refuses to even make a formal response.

### 2042

* A group of chosen children from the United States fight Cherubimon, who has become corrupted by Malice. Project Einherjar is forced to cease operations in the Dark Area because of her. Upon her defeat, MIDGARD finds a way to effectively "cure" Malice.
* Cherubimon is released back into the Dark Area, working with the humans to retrieve Malice-infected Digimon.

### 2043

* With some progress made in deciphering Strange, Yamashiro "pilots" Alphamon's body for a time by linking his consciousness with his body, almost like using an "Avatar."
* This development is kept a secret, and Alphamon (Yamashiro in Alphamon's body) begins pulling the strings in the Digital World.

### 2046

* More progress is made in deciphering Strange. Yamashiro formally unveils the schematics for a "Nova Tree," but the idea is rejected by the Board of Directors for being too risky.
* Yamashiro orders the project anyways, and a new host computer begins development.

### 2047

* Yamashiro meets with LordKnightmon (another Royal Knight who had escaped the wrath of the Demon Lords) as Alphamon. LordKnightmon, knowing Alphamon was always amenable to reason with humans, asks Alphamon to join him in recruiting the help of humans to restore the Royal Knights to power.
* Alphamon arranges a meeting with the Einherjars and LordKnightmon, and Alphamon shares with him the idea for the Nova Tree. LordKnightmon is reluctant to go along with this, but ultimately makes a bargain to discuss it with the other remaining Royal Knights when they are reassembled.

### 2048

* Seven chosen children appear at Arc Academy Tokyo.
* Alphamon plays double agent behind even MIDGARD's back, making a deal with the Demon Lords. Alphamon orders them to spare no effort to eliminate the chosen children in return for assuring their rule. He wishes to create enough unease about the current Digital World to push his ambitions.
* When the chosen children arrive in the Digital World, Ofanimon and BlackSeraphimon (who are among the chosen children's Digimon) immediately hear Homeostasis. It warns them that the Demon Lords know of their presence, and are after them.
* Homeostasis speaks directly to the chosen children through Kurisu Kanata after BlackSeraphimon tells his partner everything. Ofanimon is initially upset with BlackSeraphimon for this.
* Despite the warning, six of the seven chosen children are killed in battle, with the Demon Lords unquestionably emerging victorious. Kanata is the only survivor, having been saved by divine intervention from Homeostasis.
* Alphamon kills the Demon Lords himself, reclaiming the Digital World. He retrieves their Digi-tama, and places them in the maximum security nursery at Arc Academy Tokyo.
* LordKnightmon discovers that Alphamon had the power to wrest control from the Demon Lords, but chose not to. Alphamon uses Apocalymon's power to revert LordKnightmon to Baby form, and hands him over to the humans. Now powerless to oppose him alone, LordKnightmon concludes that he was tricked from the first, and begins suspecting that Alphamon is actually Yamashiro.

### 2049

* A severely traumatized Kanata is placed under strict observation by MIDGARD, but is allowed to finish his time at the Academy. He manages to stay out of battles for his final year.

### 2050

* Yamashiro personally recruits Kanata to create digital lifeforms that will help future generations of chosen children. He begins work on "ASK" and "EMBLA."

## 2052-

### 2052

* Yamashiro becomes the chairman of MIDGARD.
* The Board of Directors announces that a DTS 2.0 is in development.

### 2053

*The majority of the events of Digimon.arc take place during this year.*

#### April

* Amamiya Yuuki moves to Tokyo with her mother and father.
* Yuuki begins attending Shinsenchou Jindai Senior High School in Shibuya.
* While at Arc Academy Tokyo's campus, Yuuki causes one of the Digi-tama in the maximum security nursery to stir.
* Yuuki is forced to enroll in Arc Academy. She becomes the first student in E-class worldwide in five years.
* Arc Academy holds its entrance ceremony.
* Later in the month, Hayakaze Kiyoharu, Shiina Kei, and Kagari Homura enroll in Arc Academy, joining E-class.
* Arc Academy has its first Rank Day.

#### May

* Imaji Chihaya and Hanamura Madoka enroll in Arc Academy, joining E-class.

#### July

* End of Term assessment begins.
* Students in P, U, and E-Class start their five day internships with various Tamer Societies in Tokyo.

#### September

* At the closing of the summer holiday, students participate in an autumn re-ranking.

#### October

* Arc Academy holds its Cultural Festival, ArcFes.

### 2054

#### January

* Arc Gran Prix takes place at Arc Academy Tokyo in preparation for the chosen children's foray into the Digital World. The event is broadcasted worldwide.
* ASK and EMBLA complete development. Kanata presents them to the chosen children.
* At the end of the month, the chosen children enter the Digital World.

#### March

* End of Term assessment begins.
* Arc Academy holds its Graduation Ceremony.