Author's note:
This won't be a direct adaption of Gundam 00; there will be major changes in the story.
I thought of this story thanks to talking with some of my friends (you know who you are!) Intentionally or unintentionally, you helped with this by giving me some good suggestions.
Now, without further ado, let us begin….

With Fossil Fuels depleted, the only source of power are the three large-scale Solar Systems, each controlled by a different group-The Union of Solar Energy and Free Natiions (Union), compromising of the United States, Australasia, and Japan, The Human Reform League (HRL), which encompasses most Asian countries, and the Advanced European Union (AEU), which consist mainly of European countries. Countries not a member of any of the three alliances have difficulty acquiring energy and power struggles are not uncommon. It is in this chaotic world that one organization will rise in order to eradicate all war….

2307 AD
A ruined battlefield. The only sounds that can be heard are the mechanical movements of the gigantic mobile suits that were their enemies. Around her she could her the screams of her fellow soldiers, all young children like her who were forced to fight at a young age. As one of the suits aimed it's gun at her she too thought it was her end. However she looked up and saw the one thing that changed her life.
"Gundam…."
Umi Sonoda sat in the cockpit of her mobile suit as she prepared for her mission.
She remembered that day vividly. The day she first met the Gundam.
Now it's time for the whole world to know of their existence…

AFRICAN ORBITAL ELEVATOR
Eli Ayase wiped sweat of her brow as she worked on her camera, adjusting its settings.
Eli is a journalist, and right now she is assignment here, in Africa of all places.
She was seating along with other members of the press, as well as other members of the AEU-mostly government officials and military people, waiting for the demonstration of the new mobile suit, Enact. Although everyone back at the office was lauding her and telling her that it was such an opportunity for Eli to witness such an event, she secretly thought that everyone was just relieved that she's the one that got sent to this hot part of the world instead of them.
The tall blonde sighed and looked at the Orbital Elevator. There were three Elevators ,with this one being controlled by the AEU. Each Orbital Elevator was a towering structure reaching up to space. Orbital Elevators bring solar energy to Earth.
"It's starting!" Eli heard some of her seatmates say. Eli raised her camera, ready to take snapshots.
The Enact was colored in a light green color, and it was tall and spindly, with long legs.
The pilot showed off the capability of the suit, shooting the practice target presented with ease.
It was at the moment that something landed from the sky.
"What is that?" Eli said as she took more pictures. The new mobile suit was tall and colored blue. It was sleek and on it's head was a crest that resembled a letter V. On each hip was a sword. Eli used her Camera to zoom into the suit's head, and saw what was engraved on it's forehead.
"Gun…dam…"
The Gundam quickly drew one of it's swords, slicing the Enact's left arm.
"Is this part of the demonstration too?" A reporter asked.
"No, look! Those military guys are evacuating the higher-up government officials!" another replied.
Eli didn't notice; she was too entranced by this new mobile suit, this Gundam.
The Enact tried to retaliate by firing it's rifle, but it's bullets just bounced off the gundam's armor.
"Incredible…" Eli said. One of the Enact's boasted about features is it's powerful firepower, and yet this Gundam just shrugs it off.
The Gundam charged, slicing the Enact's remaining arm and pushing it to the ground with a kick.
Eli stared, mesmerized, as the Gundam took off. Well. Looks like this assignment wasn't such a bore after all.

"Mission complete."
With the Enact destroyed, Umi Sonoda, piloting the Gundam Exia, flew away from the scene.
"That was almost too easy," Umi thought.
"Don't be so sure, Umi-chan, remember what Nozomi-chan said!"
Umi heard the voice of Kotori Minami, her teammate for this mission. Like her Kotori was also a victim of war, but now they had a chance to end once and for all.
Just as Kotori said her warning Umi sensed some approaching enemies on her radar.
"As expected of Nozomi. Enemy identified as AEU's Hellion mobile suits."
The Hellion was bulkier and less powerful than the Enact, but in numbers they might be able to overwhelm Umi's Gundam Exia.
Umi charged into the Hellions, using her GN blades, one in each hand, to destroy the opponent in one strike.
However they have the advantage of numbers, and one Hellion approached Umi from behind.
"Umi-chan!"
Umi heard her friend's warning, and turned around to see the Hellion blown up by an energy blast.
"That was close!" Kotori said.
Kotori was using the Gundam Dynames-it was color green, with two shields on either shoulder. Unlike the Exia which was armed for melee, the Dynames was made for range, and as such is armed with a sniper rifle. A very long range sniper Rifle. Kotori was actually positioned in the ground, hidden in some rock formations to avoid detection. The Dynames' exceptional range allowed it to hit the Hellion with such accuracy.
More follow up blasts destroyed the remaining Hellions.
"Thank you, Kotori," Umi said.
"It's nothing," Kotori replied. "I wonder how Nozomi-chan and Nico-chan are doing?"

HEAVEN'S PILLAR (HRL ORBITAL ELEVATOR, OUTER SPACE)

NIco Yazawa waited behind some asteroids, watching the Orbital Elevator Heaven's Pillar. The short, black haired girl was getting slightly bored.
She opened the intercom to her partner and superior for this mission. "Hey, Nozomi. Are you sure your data is correct?"
Nozomi Toujou's face appeared on the screen. "Do you doubt me, Nicocchi?" The purple haired girl held her hands up threateningly.
"No, no, it's just we've been waiting here…"
She noticed the radar. "Well. Looks like you're correct after all."
A group of Hellions were approaching the Heaven's Pillar. These were terrorists, and they had acquired mobile suits through illegal ways. Now they plan to take over the Orbital elevator.
"Time to work," NIco said.
The first of the Hellions were hit by missiles fired Nico's Gundam Kyrios, which looked like an orange and white jet. Because of this look it could move fast and evade attacks.
However that's not all it could do-it could also transform into a humanoid mobile suit mode. Now armed with a beam rifle it shot at more of the Hellions.
"More incoming!" Nico said.
"Leave it to me."
Nozomi left her hiding place and flew in front of Heaven's Pillar. Her suit was the Gundam Virtue, a heavily armored suit with two cannons mounted on the back, and a huge GN Bazook as it's primary weapon.
Nozomi held the GN Bazooka in both hands. "GN Bazooka, burst mode."
"Fire!"
A powerful blast emitted from the Bazooka, eliminating all other enemy mobile suits.
"Now that we're done here, how about we go back to the ship?" Nozomi said.
Both the Kyrios and Virtue flew away, leaving the people in the Orbital Elevator wondering just who it was who rescued them.

JAPAN
Yukiho Kousaka yawned. She would rather rest in bed all day, since last night she spent working on a project for school. However Arisa Ayase dragged her to go shopping, and Yukiho just can't resist the blonde quarter-Russian. Arisa did need company, since now her sister Eli was on an overseas assignment.
"You never get tired of shopping, huh?" Yukiho said as they were walking on an overpass. She was carrying some of Arisa's purchases.
"Of course, we are girls after all! We always need to look good," Arisa replied cheerfully. Arisa was also carrying some bags.
"Oh, here." Arisa put the bags down and started rummaging through them pulling out a blazer. "This one's for you."
Yukiho blushed. "For me?!"
"Of course! It'll look cute on you." Arisa quickly bought out her cellphone and snapped a photo of Yukiho.
"Hey, what was that for?"
"I'm going to upload this on Facebook!"
"No, stop!"
Arisa was already in the process of uploading it when suddenly her screen went blank.
"What? I'm sure I charged this…"
Suddenly a logo of some kind appeared. It resembled two spread wings, much like an angel.
The face of of a bald man wearing eyeglasses then appeared.
"What is happening?"
"It's not just you," Yukiho said. Around them, people were also experiencing this strange occurrence.
A huge electronic billboard also displayed the same video. The man spoke.

"I would like to address this statement to every single human being born and raised on Earth. We call ourselves simply Celestial Being. We are a private armed organization in possession of the mobile weapon Gundam. The main objective of Celestial Being's activities is to completely eliminate acts of war from this world. We do not act for our own benefit or for personal gain. We have chosen to intervene for the greatest goal of all to rid ourselves of the scourge of war. As of this moment I make this declaration to all humanity. Territory, religion, energy no matter what the reason or excuse if there is an evident act of war being carried out, we will commence intervention with our force. Any country, organization or corporation that promotes war will also be a legitimate target for our intervention. We simply call ourselves Celestial Being. We are an armed organization that was established to eliminate all acts of war from this world. I repeat..."

In the bridge of the space ship Ptolemaios, Umi, Kotori, Nico, and Nozomi also watched the broadcast. Their first mission was done.
Now they had announced their intentions to the world. The die has been cast.