Doomsday (The Three Kingdoms)

Doomsday refers to a two day period between 1200 UTC 20th December 2012 until 1200 UTC 22nd December 2012 when people, objects and locations from fictional dimensions, immediately appeared all over. If locations had a canonical location on Earth, they generally landed in those places. Characters and objects were generally dropped in random locations. Only one canonical version of each character, object and location were brought into the real world. Within two hours the entire world was aware of the phenomenon that had just taken place though no one knew the cause.

The Doomsday Clauses
Due to only a few, relatively, fictional objects being affected by Doomsday, there have been theories as to which newcomers were brought through. Four theories are generally agreed to be possibilities. The most noticeable consequence of these clauses was that Earth did not completely collapse under overpopulation.

The Clause
There were no newcomer counterparts of natives or real objects and locations where the fictional object had not been given enough room to develop as their own being. Examples include, and  where while all three are very prominent in fiction, none of their fictional counterparts were designed to be separate from the object they were based on and were thus not affect by Doomsday. Examples that have expanded into their own form and have been affected by Doomsday include (based off ),  (based off ) and  (based off New York City).

The Generic Clause
Many fictions involve presenting a large number of fictional object or people as a representation of high density, such as for military forces or entire species. That means, to the natives interacting to the fiction, the majority of the group of objects are not given enough exposure as their own character, as much as this is untrue in the fictional world. Similarly, Doomsday ignored the majority of such huge numbers, only bringing through a vastly smaller number, usually around twenty. Fictional militaries affected by this include 's, and. Fictional species affected by this include the s, the s and the s.

The Unique Clause
Only one canonical version of each object or newcomer was brought through by Doomsday. Characters based on others but are clearly different people were still affected. For instance,, The Hero of Time, and , The Hero of Winds, are two different people so were both affected. On the other hand, from Timeline A and  from Timeline B are the same person, hence only the Timeline A version was brought through by Doomsday.

The Time Clause
Even though it was the 21st December 2012 on native, Doomsday did not pull newcomers from that exact period in time. It is considered that Doomsday chose a time relatively soon after the newcomers' most important achievement, unless they permanently died after it without becoming undead, where Doomsday chose an earlier time instead.

History
At exactly 1200 UTC 20th December 2012, just as the 21st December started at, people and locations from fictional dimensions, immediately appeared all over. If locations had real world equivalents, they generally landed in those places. Characters and objects were generally dropped in random locations, later known as s. Only one canonical version of each character, object and location were brought through. Within two hours the entire world was aware of the phenomenon that had just taken place though no one knew the cause.

However, politicians had other things on their mind. Many of these s were potentially dangerous. Many could use magic, possessed vastly superior technology or were not human at all. The vast majority could destroy a city with very little effort so they were branded as dangerous.

planned to put these newcomers in expensive celebrity accommodation to get on their good side, clearly aware that prison would fail at imprisoning them. The person they approached first was of the  video game series who had found herself in. Reimu rejected their proposal, insisting that she wanted to find her that she managed in the world she came from. While she appreciated offers to search for the shrine in her place, she continued to refuse to move to the accommodation and prepared to fly out of the city. Suddenly, a nearby human observer shouted out a so far undisclosed sentence as a joke. Within an hour, Reimu had single handedly annexed the entire country. The shouting of the single sentence would come to be called.

, in, , at the time, of the software line, began annexing any and all nations that she and her partners passed, in the name of protecting them from Reimu's wrath. Conflict between s and their allies and Touhou and its allies erupted across the planet. Offensives and retreats eventually formed a de facto border between the two factions with the main expectation being that the world to fall into two zones, one ruled by Reimu and the other by Miku.

However, of the, who had been in , , had been watching the media coverage, her rational thoughts of logic and nature being shattered by the unnatural events. As a result, she had come to realise her godlike abilities and immediately attempted to put them to use.

A three-way world war began with predictions that Haruhi would dominate the entire planet with her powers. Haruhi was in fact unable to gain the upper hand, unused to her newfound abilities and both the other factions being able to block her powers with their own skills, the Vocaloids' ability to create and Reimu's ability to form the supposedly impenetrable. With Haruhi's sudden entrance into the conflict, both Miku and Reimu established their respective barriers across their currently owned territory in fear of Haruhi unleashing her full potential.

Within twenty four hours of the newcomers' sudden appearances, the world had been split between three territories, Miku's, Reimu's and Haruhi's. Within another twenty four hours, and The Sonic Barrier had been fully erected, effectively preventing  from communicating. This happened at 1200 UTC 22nd December 2012 as the 21st December ended at The International Date Line, ending Doomsday.

Consequences
Doomday split the world into three separated territories, The Yamaha Kingdom, Gensokyo and The North High Colony, collectively known as, that continued individually and mostly militaristic operations in preparation of war against the others. Natives were subject to newcomer control, with many powerful natives removed from their positions or became puppets.

Meanwhile, many feared for their own worlds, families and people not brought through by Doomsday who had their homes and friends suddenly taken away.

Haruhi eventually became bored and caused.

Trivia

 * Gensokyo managed to push both Miku and Haruhi, the leaders of Yamaha and North High respectively, out of their Doomsday locations, and  respectively.