Woo-hoo! My first fanfic! I have been wanting to do one for a while but I haven't got the inspiration until I noticed a couple of things. One, there are very few fics for Armored Core and Gate (Granted that the latter was only few since it is still few months old but it is still too low for my tastes.) Now the first chapter will be about the history first and I will be posting the next one once I have enough ideas. Since this is an AU Crossover, plenty of things will be changed in my story like making Itami a little bit younger as well as changing the positions of certain characters. Since the Gate has opened into the Armored Core Universe, you can expect the Empire to get its ass whupped VERY HARD. I also added a few extra things to the Armored Core part of my story like hacking and such. If you have any questions then please just add them to the review and I will answer it shortly as much as I can. Please refrain from using the PM for a while since I am still trying to rearrange something there first.

Disclaimer: I do not own Armored Core and Gate: Thus The JSDF Fought Here except perhaps my own ocs.


*History*

August 30 2183 - ORCA began initiating the Closed Plan in which its objective was to destroy the thousands of orbiting Assault Cell satellites which are preventing humanity from expanding into space by using the Ehrenberg Anti-Satellite Cannons. However to use them, they would have to divert the energy from the Arteria facilities powering the Cradles meaning that to use the cannons ORCA would have to sacrifice millions of people in order to ensure humanity's survival. To prevent them from executing their plan, The League sent Wynne D. Fanchon, pilot of the NEXT Reiterpallasch, Roy Saaland, pilot of the NEXT My Bliss and Lilium Wolcott, pilot of the NEXT Ambient to stop ORCA from accomplishing its goals. Leading the defense against the League are Maximilian Thermidor, pilot of the NEXT Otsdarva, Setsuna Youji, Pilot of the NEXT Amaterasu, Old King, pilot of the NEXT Lisa and Luna Arclighter, a defector from the League's forces and pilot of the NEXT Joyeuse.

During the attack, Old King and Luna suddenly betrayed Thermidor and Setsuna and revealed to both the remaining ORCA members and the NEXT pilots currently aligned with the League that Luna is currently uploading a very strong virus into the computer networks controlling the Assault Cells which once the virus has completely spread and taken control, it will then forcefully command and direct all of the active Assault Cells to fire on every Cradle housing mankind which will ensure a devastatingly horrifying mass genocide of immeasurable scale as well as the ensured extinction of mankind. To ensure that their plans won't be easily stopped, Old King and Luna activated the bombs that they secretly planted inside the Cannons' batteries, destroying the Cannons and preventing them from being used to destroy the Assault Cells that will slaughter countless innocent civilians. Otsdarva and Amaterasu as well as Reiterpallasch, My Bliss and Ambient quickly made a temporary alliance on the spot in order to stop the two genocidal maniacs however Luna and Old King were prepared as during the time Luna was still working at the League's side and even after she defected to ORCA's side, she secretly uploaded one of her special viruses into Roy, Wynne and Thermidor's NEXTs during some of the times the three worked some jobs together with her and the viruses she had uploaded had been laying dormant within their NEXTs ever since until the moment she needed to activated them and in that moment, she did. Luna's viruses activated and instantly stolen and transferred the controls of Otsdarva, Reiterpallasch and My Bliss towards Luna, bringing them helplessly under the control of the two dangerous traitors and leaving the remaining NEXTs, Amaterasu and Ambient, hopelessly outnumbered. Luckily with the help of Kasumi Sumika who managed to swiftly hack into Otsdarva, Reiterpallasch and My Bliss albeit with difficulty and only after Ambient and Amaterasu managed to significantly damage them enough, Amaterasu and Ambient managed to eventually defeat Luna and Old King, destroying Luna's NEXT Joyeuse and preventing the complete transmission of Luna's virus from spreading to the majority of the Assault Cells which in extension, saved the majority of the Cradles from destruction as well as killing Luna in the process although at a great cause as Old King managed to escape and some of the Assault Cells still managed to fire and destroy a couple of the Cradles, killing at least 40 million civilians in the ensuring destruction. On that day, both ORCA and the League issued a temporary ceasefire in order to completely assess the tremendous damage caused as well as the huge amount of lives lost to the senseless genocide caused by Old King and his now deceased accomplice. Old King has been declared a war criminal by both sides and both issued a direct 'kill on sight' order to all forces regarding the omnicidal maniac who is now currently on the run.

August 31 2183 - Major riots and vandalism sparked out within the civilian populace immediately after the destruction of two Cradles by the Assault Cells. The public opinion completely turns against the ruling corporations after the mournful event. Between the millions who died and the fact that the pollution from the surface is slowly worsening and will eventually approach the Cradle's location within a single lifetime, the public angrily demands the corporations to take immediate swift action on the problem. Public opinion on ORCA gains a significant rise after many began agreeing with ORCA's goals despite its methods and reputations and even some think that their methods maybe necessary to ensure humanity's survival. Some of the small corporations that were secretly supporting ORCA suddenly declared their open support to the organization in order to take advantage of the situation.

September 2 2183 - After a few days of resistance, the League finally gave in to the demands of the public after events were slowly starting to devolve into total anarchy. The League and ORCA formally signed a truce in which the League formally recognizes ORCA as an official organization in which Thermidor assumes leadership. The League also promised to destroying every Assault Cell they have in orbit as well as expanding their research onto space travel and terraformation technology to enable mankind to travel to the moon and Mars and colonize it. The Cradles and several hundred Arms forts are now being upgraded to be capable of space travel.

September 4 2183 - The League directed their Assault Cells to fire on each other until only a handful were left before the League directed them to self-destruct. Space is once more safe for travel.

September 21 2183 - The Kojima Drive Engine was finally developed which will enable the Cradles and Arms Forts to easily travel to the stars and the new invention was swiftly installed into the ships.

September 23 2183 - The liberation begins and thousands of ships were finally able to break through earth's atmosphere and began leaving towards the moon and Mars where the plans to develop a colony by constructing special environmental domes where mankind could live in place. Each dome is capable of housing a population of 30 million people.

October 25 2183 - The first fleet managed to arrive to the moon and begins plans for terraforming and construction of colonies. The remaining fleet continued on towards Mars.

November 28 2183 - The construction of the Moon colony's domes are complete. The creation of a functional government was next in step and both the League and ORCA helped in the establishment.

December 3 2183 - Setsuna Youji and Kasumi Sumika both announced their engagement to one another, stating that they are planning to get married on December 25, a special date once known as Christmas in the past. Both Thermidor and ORCA as well as some of Setsuna's closest friends and fellow LYNXs like Takafumi Arisawa, May Greenfield and Shiro Kamui, pilot of the famous NEXT White Glint congratulate the two on their engagement.

December 24 2183 - The last migrant fleet managed to arrive on Mars. The terraforming and construction of the environmental domes that will house the colony begins.

December 25 2183 - Setsuna Youji and Kasumi Sumika got married to each other inside one of the makeshift cathedrals on the moon colony and various important figures attended the ceremony which included Thermidor, several representatives from the League and several of Setsuna and Kasumi's closest friends and relatives however, the ceremony got interrupted after Old King unexpectedly crashes into the party and begins wrecking havoc in the colony. Setsuna quickly jumps into his NEXT Amaterasu and is followed by Thermidor and several other LYNXs present in the ceremony. Old King's NEXT Lisa was seemingly alone in its rampage and it would seem easy to subdue and destroy him however Kasumi managed to pick up high levels of Kojima Particles radiating from Old King's NEXT and she discovered that Lisa was actually armed with a highly lethal bomb that should Old King's NEXT be destroyed, it will unleash a deadly spread of highly contaminating Kojima Particles into the environmental dome, poisoning everyone inside and inflicting a massive genocide that will almost rival the Cradles' fall in casualties. Luckily, Setsuna managed to safely disarm the highly dangerous NEXT with help from Thermidor, Takafumi and Kasumi. However upon opening Lisa's cockpit, they discovered that Old King wasn't actually in there and it was just being remotely controlled from somewhere within the colony's base. Security was raised and Kasumi tried tracking the signal's origin but unfortunately, Old King escaped once again.

January 27 2183 - The Mars colony's construction is complete. Establishment of the government's constitution begins as well. The League sends several probes into the nearby asteroid field as well as to the moons of the outer gas planets to search for minerals to be used for the colonies' benefit. A new company named Yanagida Industries was established.

March 30 2183 - Yanagida Industries discovers a counter-agent to Kojima Particles that can eradicate it at an atomic level. This discovery of Yanagida Industries practically revolutionized the industry as the League and ORCA won't have to worry much about the extreme pollution their NEXTs will generate. To avoid falling back in discovery, the other corporations began to research various ways on how to improve Kojima and NEXT technology.

May 2 2183 - The League announces its plans to begin cleaning earth of its heavy pollution in order to reclaim it once more for mankind. The League however states that such a process may take time before the planet is completely recovered. Thermidor and ORCA voices their complete support of the League's plan.

June 26 2183 - Yanagida Industries begins developing all kinds of strange weapons like chainswords, TESLA cannons and flamethrowers which the latter were previously deemed ineffective. However with the improved designs and mechanics developed by Yanagida Industries' best scientists and developers, they were actually able to improve the lethal effectiveness of the flamethrower by using an advance form of super heated plasma instead of regular fuel induced flames which enables it to eat through an enemy NEXT's shields with ease. When the CEO of Yanagida Industries, Shinichi Yanagida was asked about why are they developing and improving such strange kinds of weaponry, he simply tilts his glasses and said "Why not?"

December 2 2183 - Setsuna and Kasumi finally had a son whom Setsuna named Itami after his own father.

February 15 2184 - Recent developments on medical improvements by the League's scientists and researchers saw the eradication of several diseases that have long plagued mankind since the dawn of time. Humanity's life expectancy increases exponentially.

November 21 2184 - Improvements on NEXT and AMS technology allows the restrictions of being a NEXT pilot to be significantly reduced which in turn increases the ranks of the LYNXs the League and ORCA both currently have under their employ.

April 18 2185 - With military operations laying low and no jobs of violence or sabotage available to curb the boredom of some combat hungry LYNXs who have been heavily deprived of conflict ever since the battle between the League and ORCA ended, Thermidor and the League decided to create a yearly NEXT combat championship tournament which will pit off several of ORCA and the League's best LYNXs against each other in a friendly battle for supremacy. Millions of tickets were sold and the League managed to create a large amount of profit from the sales as well as merchandise. The NEXTs' military functions still remain in case hostilities between the League and ORCA ever resume again. The first champion of the tournament was a female LYNX pilot from ORCA who piloted a NEXT called Guilty Spark.

Feb 26 2189 - At least 10.54 percent of the planet has been cleaned of radiation.

April 18 2191 - Hostilities in the 7th Annual NEXT championship tournament have occurred after the victor of the tournament, a male LYNX piloting a NEXT named Tezcatlipoca was accused of cheating by secretly hacking into his opponent's NEXT. Evidence of cheating was found and Tezcatlipoca's victory was declared null and void with the trophy being awarded instead to the second runner up, an ORCA LYNX piloting a NEXT named Yatogami.

July 27 2194 - Omer Science and Algebra managed to vastly improve and develop the flight capabilities of NEXTs, enabling them to stay up in the air for as much as 35% longer and reaching maximum speeds in less than 15% of the original time.

June 5 2196 - At least 21.96 percent of the planet has been cleaned of radiation.

January 13 2199 - Old King was finally discovered hiding in one of the reclaimed areas of earth underneath an old military bunker that was once used by the League. A special task force was immediately set up to hunt down the dangerous fugitive and it consists of several top class NEXT pilots which even included the likes of Shiro Kamui, pilot of the legendary NEXT White Glint and even Setsuna Youji himself who, despite their age, are still at the top of their game. During the assault on Old King's hideout however, a couple of task force members have lost their lives due to some traps Old King has placed in his hideout while a third lost her life due to an unexpected drone ambush that Old King has set up. When the real fight against Old King began the Task Force found out that even with his age and the fact that he was outnumbered greatly, Old King was still more than a simple match to them as the dangerous LYNX pilot managed to kill one of the task force members in the fight and even disabled a couple more before White Glint and then Amaterasu managed to stop him by cutting off his arms, damaging his shoulder weapons and disabling his boosters with a well placed sniper shot. Once Old King's NEXT was finally critically damaged, Setsuna delivered the coup de grace by burying Amaterasu's MOONLIGHT blade directly into Lisa's cockpit, killing Old King and finally avenging the deaths he caused in his senseless acts of genocide.

August 19 2205 - At least 31.13 percent of the planet has been cleaned of radiation. The League and ORCA has began sending research teams to assess the planet's living condition and found out that some of the cleared areas can now fully support a sizeable population again.

November 20 2205 - After some careful considerations and planning, The League and ORCA have allowed a certain number of people to return to earth again after the Moon colony is showing signs of a very strong population growth.

May 6 2207 - Scientists, researchers and archeologists from both the League and ORCA began excavating the ruins of 21st century civilization located in some of the areas reclaimed from the pollution like the former United States, China, Russia and Germany.

January 11 2210 - Large areas of land are now being reclaimed and it includes countries such as Brazil and France.

October 17 2210 - Shinichi Yanagida decides to retire from his position as CEO of Yanagida Industries due to his growing health complications. He was succeeded by his son, Akira Yanagida, as CEO of the company.

January 2 2212 - Japan is reclaimed.

February 13 2212 - A very large research team from Yanagida Industries is sent to Japan to excavate the ruins of what is formerly known as its capital city, Tokyo. Accompanying the research team are a dozen normals as well as a couple NEXTS who will be serving as the research team's security where they will set up a base near its former capital district.

March 26 2212 - The research team discovered a strange building amidst the ruins in an area of Tokyo that according to the history files, was once known as its Ginza district. The building is strange because its architecture more closely matches the ruins located in the reclaimed areas of Greece and Rome instead of the ruined buildings in Japan. In addition to that, the research team has discovered strange energy fluctuations happening around the ruins. Sensing that something is amidst, the research team set up a dozen guards near the ruins before they contact the CEO of the company about the discovery that they have made.