Perseus Achilles Jackson: Son Of Many

The War

The Olympians swiftly swung into action with Hephaestus and his Minor god sons making weapons while assisted intermittently by either Athena or Apollo
Note: Zeus had in no small words immediately ordered their return to Olympus even allowing Calypso to come with them when he learned of her new status as Percy's wife perhaps she could help with the medicine and healing during the war.
Hermes and Ares were sent to Camp Olympus to bring them up to speed and train them, Hera and Hylia Ramirez were sent to the same thing with the Amazons. Artemis and Diana took care of the Hunt.
The Titans and Primordials secured mount Orthys to ensure that Order did not try to double back and attack them.
Poseidon, Triton, Tyson, Amphitrite and Sally Jackson were on standby ready for anything. Hestia would stay on Olympus to watch over it. Thus, all fronts were covered, Order would not know what hit him.

A week later

Chaos woke Perseus up and informed him of the situation, however, she told him to remain hidden because Order could not know about him, she told him that everything was ready. So, he stayed on Olympus in wait for her order to move. That was what she told him to calm his frayed nerves but the real truth was that, there was no way she ever allow him fight because he pushed his limits and surpassed them, furthermore there was something she did not tell anyone:
She knew that her darling son Perseus Achilles Jackson was as powerful as her, plus by fighting Order and winning in just the first round he had effectively removed himself from the control of the Fates, therefore, only his Ananke and herself surpassed him.
Thus, if Percy was allowed to fight, Order would not stand a chance because the level of power at which he was now meant that he could end Order's existence with a snap of his fingers.
Order was over the moon, he was going to finally topple Percy Jackson, by striking him in his heart which was his home in Atlantis, he had been beaten soundly once by Percy when he first tried to attack the Hunt which is Olympus's most used infantry division second to the demi-gods in Camp Olympus.
He was about to storm Atlantis with his army of monsters ranging from Minotaurs, Empousa Draecne Cyclops harpies, Giants, storm spirits, hydras, Gorgons, Earthborn Metal born and Gem born etc.
Before he was stopped by Chaos who reminded him that he had already been defeated fairly once and by the rules of battle if he was defeated again, then he would have to forfeit and surrender himself. The terms to which he reluctantly agreed while mumbling about his first defeat.
She also said that she would not be responsible for what happened to him and his army if they attacked prematurely which would violate the terms of the agreement, as they(herself included)had the right to defend themselves if attacked.
Note: she did this to prevent a bloodbath and needless death of demi-gods and monsters as balance needed to be maintained, since you cannot have monsters without any demi-gods to fight against them. If that happened and the demi-gods were enslaved and monsters and rogues ruled, then legends would cease. In other words they needed the ongoing circle Chaos and Order to continue as it was because if they did not have not have it as it was then the world would be way too bland.
The Minotaur being too over confident that they would win due to the sheer number of their forces decided to jump the gun and ordered his squad of Monsters to engage the enemy, it was his biggest mistake. In response two Olympians in this case Apollo and Artemis opened fire on them, continuously doing so until they were turned to dust, mind you they were not even using their full powers. Apparently after he woke up, Percy trained himself so that he became a power vacuum in order to store more power, as such he was as powerful as his mother Chaos.
Over time he also graciously trained to do the same as him although not to the same level as his mother and himself because the hierarchy of power needed to be maintained to ensure balance and order.
The next one who was prideful and foolish enough to flout the truce was the Manticore a.k.a Dr Thorn and his company, only for them to be demolished with lightning by Zeus, Athena, Thalia and Jason Grace. By now 40% of the huge army had been decimated leaving 60% remaining. A warning was then issued by Rhea that the next provocation would be their last and no mercy would be shown at all.
Meanwhile, Percy eventually got bored waiting for Chaos so he teleported himself and his family to the battlefield though they stayed out of sight hiding in the clouds, alerting nobody to their presence.
Just then the Chimera and his mother Echidna along with their group of monsters got cocky despite the earlier warning that was given by Rhea, and they made their way towards Poseidon and the Atlanteans only to be hit by bolts of scorching lightning from Perseus and Athena burning them to crisp.
The look on Percy's face took Artemis back to the first day he joined the Hunt. Swirling around him was a mixture of Water, Fire, Wind, Lightening and Darkness. His look promised a painful death to his enemies, you did not want to cross him, it made her scared but excited as she could not wait to see what he would do.
They landed on the ground with an earthshaking earthquake possibly bigger than that made by Poseidon whenever he was angry.
The elements and the earthquake do the job of taking out 50% of the army leaving 10% of the army. Order was frozen in shock at the utter desolation of his forces, so much that he spoiled himself out of fright. Alternatively, the Olympians, Atlanteans, Titans and other Primordials were beaming with pride.
Seeing that his army was now reduced to a shadow of it's former state, Order begged Chaos on his knees to send them to the void.

Author's Note:
I do not know if there will be an epilogue after this. Stay Safe my friends. If you want a sequel where Order is redeemed and reformed, let me know in the comments. Again you guys get to choose the Villain so please your suggestions are welcome.

Yours sincerely,
swordwieldingKnight