The repairs went along smoothly and he had established trade routes to the earth kingdom exchanging iron for weapons.
He had also filtered all the soliders into different groups.
Those loyal to him which he took in and gave the most priveliges and then those loyal to Azulon and the fire nation who are sending detailed reports to the fire nation about his activities.
With extreme manipulation techniques that Azulon himself taught him he filtered out the headaches and assigned them the manual labour while he worked with the confirmed loyalist to him on secret projects.
There were many of those.
For example he worked on a sniper rifle to perform perfect assasinations. It wasn't really hard, they already had explosives and the only thing they had to adjust was the precision.
But he had finally done it. He was holding the most terrifying weapon of this age inside his hands.
"Give me all the plans and destroy the prototypes" he ordered his men and he soon had a bunch of papers in front of him and the prototypes were thrown into the molten metal in the factory.
He put the sniper rifle with all the munition inside his inventory.
Oh right, he had also tested his earlyer theory if he can pit a whole fleet inside his inventory and he totally could!
That way he will hide his future secret projects from the fire nations loyalists.
"Moving on to our next projects" he said and turned to them.
"A small team will use the method I explained before to collect oxygen from water by electrifying it and storing it in tanks. We will need it later. The other team reseaches alluminium alloys and extensive pressure research with regulating devices. I've drawn rough plans so you get the Idea" Akira said and everyone started working.
His next goal was to develop an underwater fleet with submarines and divers with oxygen tanks. He could also boost explosives with special oxygen tanks.
The process was slow as expected but two months later they finally got the right alloy that can handle pressured oxygen without any issue and would hold for about half an hour under water.
As he was on an Island he had to quickly develop his naval warfare to resist the fleets of the fire nation when he would desert.
He used the fire nation loyalists for all the annoying stuff without letting them in on any military secrets and even if they knew he was building something weird they had no idea what and just went on as usual.
He also trained especially talented soliders seperately to reach master level and they were all provided with his own practice katas.
Sparing no effort he trained them in his freetime in firebending and stealth missions along with unarmed combat.
He had really created monsters as all of them had mastered lightning bending in a few months.
They were ten soliders trained with all his effort and it was honestly terrifying what you can archive if you give them special training.
The first submarine prototype also went into it's testing phase. The build was relatively simple, iron walls on the side with armoured glass fragments to see the outside.
There were giant airtanks with oxygen and weights to control the diving.
It is fueld by by hydrogen with his lightning benders fuelling them since he didn't really have other fuels at hand.
They also created an airlock chamber for divers to go in and out of the ship.
At this point in time the harbour was fully repaired and production of ordinary ships is going on in most of the factories since he needed to keep up the pretense and supply the army with high quality ships.
But now he was ten years old and he knew that during this time Azulon would die so he sheduled his return to the fire nation, taking every fire nation loyalist with him back to the fire nation along with his ten lightning benders, his personal elite guard.
At this point most of the personel working for him knew that he was conspiring against the fire nation to create a failsafe base in case he should face repercussions in royal court and are supporting him with all they've got.
He left orders and blueprints of air-ballons and zeppelins to go into production and left with almost half his men. He also instructed five of his lightning benders and the rest of the soliders to take fire nation ships and free the earthbenders to recruit them for the rebellion.
The rest of the prisoners who don't want to join will just be let go.
The target were the many prisons of the fire nation at the ocean where earthbenders were being held far off from any kind of earth.
As for him? He will return to the fire nation with all his unloyal troops and the other five lightning benders.
The plan was simple.
Let Azulon die and Ozai ascend the throne.
Dump all the loyalists on the coasts of the fire nation and take his elite soliders and raid the royal treasury and then making a run for it.
At the harbour he would put as many ships as he could get his hands on inside his inventory and flee back to his base of operations, the island Asokoh.
And when he is back on his island he would start the rebellion for real, fuelling his troops with water and earthbenders from prisons of the fire nation.
The only problem was that he had no Idea when excactly Azulon would die so it is possible that he needed to wait for a few years.
He would comission the best smiths in the fire nation to make a sword for him out of damascus steel. It was strong and looked beautiful so he won't have anything against it.
After all it would be a waste to not have a cool sword when one is as proficient as him in the sword.
Like that half of his ordinary ship fleet moved back to the fire nations capital.
After a week of travel the familiar coastline of the fire nation appeared.
He left the ship as soon as it stopped on the docks, followed closely by Noir who also had developed a very cool ability during their time on Asokoh island.
He was now able to shrink and appear as a normal ordinary black cat but he kept it secret for now to be able to stay hidden more easily later.
Marching through the grandiose city of the fire nation one really felt the power and influence the fire nation had to be able to go against the rest of the world.
He entered the palace, his home without any problems and lied down on a bank in the garden having no idea what to do until Azulon dies.
Then an idea crossed his mind as he remembered one of the scenes where Azula used the fire on her feet like jet blasters to fly.