Disclaimer: I did not own Metal Gear and Code Geass. They're belong to respected authors/owners. Also, This is inspired by the author who made Metal Gear X Code Geass. Which is called Metal Gear Solid: Code Zero.

Another thing, This is required by Captainrex2177 for the story.

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Location: Alternate Earth

3rd Person Pov

2010 a.t.b, August 10th. The Holy Britannian Empire declared war on Japan. The island country in the far east that has maintained neutrality with one of the world's superpowers, Britannia. Between them existed an on-going diplomatic conflict that had resulted from Japan's natural resources, Which is called the Sakuradite. During the mainland battle, the Britannian army used the Mobile Humanoid Combat Armored Knight, the Knightmare Frame, in combat for the first time. Their power was beyond anything imagined. The defense lines formed to protect the mainland were breached one after another. Japan became a territory of Britannia and had their freedoms, rights, and names taken away. Thus Area Eleven was created as the new name for Japan. Unbeknownst to Britannia, seven years later, a threat would appear, an organization whose power are beyond their imagination, an organization of mercenaris that can fight Knightmare Frames single-handily, an organization that will change the world they know, an organization from another world, a mercenary nation called Militaries San Frontiers.

Metal Gear Geass: Militaries San Frontiers

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Location: Parallel Earth, Mother Base.

3rd Person Pov

10 Years Old, After the San Hieronymo Incident. Mother Base, or rather, Militaries San Frontiers was growing up, the once small band of mercenaries whose base of operation was a small old cabin in a beach of somewhere in Colombia, was now a huge private army on an offshore plant of the Caribbean. This once offshore plant eventually became a nation, annexing with several hexagonal struts, with a rapid development thanks to the second-in-command Kazuhira Miller, the size of Mother Base has incredibly improved, there were now more living quarters than before surpassing its limited number that was formerly one hundred, now it could carry thousands of soldiers!

The sick bay was also upgraded offering the best medical facility, the R&D lab now had 2 more facilities, with the new upgrades on the R&D team, they now possess the most advanced weaponries of the world.

There were also 3 hangars, it now carries lots of war machines, and costumed ones that are more powerful than the normal ones. Each of them located in strategic points, the original in its place, the other in a new strut bridge connection between R&D labs and living quarters, and the last one between the R&D Labs and the mission support facility.

There were 2 more mission support facility, each one of them too located in the same strategic points of the hangars, except to the original that remained in the same spot.

The command center remained the same; the only difference was that the deck is bigger and larger than before in the battle with Zeke.

It may not be an exaggeration to compare the size of Mother Base to the island of Hawaii.

Everything was perfectly fine, even if someone dared to attack them, they would be prepared with their improved missile launchers, and additionally the mounted machine guns close to the missile launchers, and if the situation was getting bad, they would send their secret weapon; Metal Gear Zeke. But this time ZEKE AI's was completed as well equipped with some of the special AI Weapons. It has the electric shot derived from the Pupa units, the S mines attack in its legs, the powerful armor and machine guns of Cocoon and the head of Peace Walker, It was certainly the most powerful walking bipedal battle tank in the world.

One day, Miller was doing paperwork in his office located in the command center, then someone knocked the door.

*KNOCK*

*KNOCK*

*KNOCK*

Millar: Come in.

After finishing one part of his paperwork, the door was opened and entered an MSF soldier. The soldier saluted at Miller while he saluted back.

Miller: So, how did the mission went?

He had sent the Alpha Team to capture an enemy fortress which was very difficult since the enemy has modified MBTK tanks that was more powerful than the costumed ones.

MSF Soldier: It went perfectly fine sir, there's been no casualty, the Walther Kampfpistole are still powerful enough to destroy the modified MBTK's, the locals rewarded us giving money and some recruits that are highly qualified for R&D lab and Combats.

He reported, Miller smirked and sank in his chair satisfied with the results.

Miller: That's good to hear.

MSF Soldier: Um, sir, there is one more thing you might want to hear.

Miller sat straight with an eyebrow raised and curious about what the MSF soldier was about to tell.

Miller: *Confused* What is it?

With that the MSF soldier turned his head to the door, he whistled and motioned someone to come in. Two MSF soldiers entered carrying a medium sized metallic box, Miller got up from his sit and walked away from his desk to get closer to the box, the MSF soldiers laid down the metallic box and opened it.

Miller was surprised at what it was inside. Inside was a transparent cubic container containing some sort of mineral he have never ever seen in his life, the shape of the mineral or rock was circular almost like a diamond and the minerals color was bright pink.

Miller: *Surprise* What's this?

MSF Soldier: We are not sure sir, we found this mineral on our way home, it was located not so far from Barranquilla Coast, our guys went in search for more this "minerals" but apparently this was the only one we found.

Then one of the MSF soldiers who carried the box stepped forward and added.

MSF Soldier 2: But that's not all sir, when one of our new recruit's scientist examined the mineral, its compositions are not classified in the periodic table! 

Miller whistled while putting his hand on his chin.

Miller: Well THAT'S intriguing.

MSF Soldier: What do we do sir? Should we discard it or keep it?

Miller was thinking on what to do, sure it could make good deeds for Mother Base, like adding it for the armor, if not they could think on many other ideas on what to do with this mineral, but on the other hand this was apparently the only mineral to ever exist, it could attract many unwanted flies, not to mention Cipher.

Miller: Take that thing to the R&D lab, I'll deal with this.

Miller went to his desk and contacted Big Boss.

Miller: [Radio] Boss.

Big Boss: [Radio] *Whisper* What's wrong, Kaz?

Big Boss whisper while reloading his tranquilizer gun behind a wall where there is a guard patrolling around in a remote base in somewhere.

Miller: How long are you going to finish your infiltration mission?

Big Boss: [Radio] Almost, Why?

Miller: [Radio] We got something that you may want to see.

Big Boss: [Radio] Can't you tell me now?

Miller: [Radio] No can't do Boss, it's something that you really have to see it yourself.

Big Boss: [Radio] *Annoyed* Ugh, ok, I'll be back soon.

Miller: [Radio] Ok Boss.

With that Big Boss turned off the radio while he caught unguarded the guard and incapacitated him.

End Prologue (1/2)

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A/N: This is half of the prologue. Also, Like I said before. This story inspired by "Metal Gear Solid Code Zero" from Ralf Ming.

The idea given by Captainrex2177.