The fight has begun, as the Siren fleet approaching to their range but they start firing but it was inaccurate, the shells missed their target. the Slava class missile cruisers got radar lock on them as they start firing their missiles towards the siren ships, multiple hit and getting them to sunk or exploded to pieces, some siren ship get in range and they start firing their guns toward the Nagato battleship, due it's heavily armor and durability for the Mithril Fleet, they just did a scratch and the Nagato's battleship cannons return fire, directly hit the siren destroyers and cruisers, they are sinking and slowly starting to vanish.

But another Siren fleet heading this way toward the oil rig where the oil tankers were stationed to gather cash to summon more ships, the Arleigh burke Destroyers reacted as they firing multiple missiles toward the enemy ships that coming, directly hitting the destroyers and cruisers but they still more coming, then the burke fire their CPB, or you called it charged particle beam, the beam went straight and penetrate the line of ships, tearing the line of ships in half as they start sinking and fading away

Atleast 3 Siren destroyer managed get in range of the 2 burke class as they firing their cannons toward it. some missed but one hit one of them, damaging the hull of the Arleigh Burke ship but that wasn't bothered the modern destroyer as they return fire with their rapid fire auto cannons at the siren ships, directly hitting them and destroying them, crumbling them to pieces.

On the seraphim, they were amazed of the firepower of the warships in their eyes right now.

Tirpitz: "Impressive, they surely incredible firepower and durability, they are more superior than ours." she said as she smile

Graf: "I Agree, I am very amazed of the weapons they using, including that?" She point at the Arleigh burke class "They equip with some sort of siren technology?" she asked to admiral Chester

Chester: "I don't think so but we called them the Charged Particle Beam or we can called it CPB. it was great use for our ships against the enemy fleet that moving a straight line or a little close to each other, like those siren ships doing the same thing as the enemies we fought..." he said as he see he has enough money, sending 2 America-class Amphibious assault ships, using them for the VTOL aircrafts and Helicopters. but it will be include ground assault in the future. 

(Jean: Their possible chance I will start doing ground assault if needed but don't think he will summon human soldiers, let's say is... armored assault, unmanned vehicles.)

Graf: "I see. quite interesting...." She went back to stare at the warships continue defending the Seraphim and the oil tankers from incoming siren fleet. They don't think they gonna interfere in the fight because the modern warships doing all the work

Now it's time to America-class Amphibious assault ships to shine as several AV-8A aircrafts taking off in VTOL from the America-class as they full speed ahead from incoming another siren fleet consist with heavy warships like battleship and aircraft carrier, as the siren fleet noticed incoming harriers, they start firing their anti aircraft weaponry. but it was no used due it's maneuvering aircraft as they firing their anti-ship missiles toward the siren ships, ignoring the destroyers and cruisers, the anti-ship missiles head directly straight toward the battleships and carrier, it was several missiles that directly hit toward the carrier and battleships, several explosions erupts as the harrier start retreating back the america-class.

we can see the battleships is on fire and some on other are already sinking, the battleship that still up and kicking, their are heavily damaged, their weaponaries are damaged as well and their movement decreasing, the siren battleship start to fire their cannons, but it was long range and most of them are missed. of course, battleship are armored and strong durability beast and it was used to close combat to give devastating blow on the enemy warships

The siren carriers are the most unlikeliest ones as they were heavily damaged, they ere slowly sinking and vanishing soon, and most of their aircrafts been destroyed due chain reactions of explosions of the aircrafts.

Siren fighters can be seen and coming toward the Mithril fleet as Admiral Chester noticed them are coming, ordering anti aircraft missiles for the Arleigh burke class to be launched. as so they did, launching anti aircrafts toward incoming siren fighters, the siren fighters start scramble to dodge the missiles, but little they didn't know, it was tracking and locked as several anti missiles hit several siren aircrafts, blowing up in the skies and crashing to the bottom of the ocean, some are lucky to dodge the missiles using their maneuvers or not get locked on. but their luck runs out as the returning AV-8A Harriers start to commence a dogfight, firing their air to air missiles toward siren aircrafts, due the siren carrier haven't acquired flares. they stood no chance agains't them as they start blowing up at the skies and crashing toward the seas, but their still be a dogfight since siren aircrafts managed get behind one of the harriers and open fire their laser projectiles as the harriers start evading their incoming attacks, but don't forget the harriers are not alone as they always have their wingman even they are unmanned, the siren aircraft that chasing the harrier get shotdown by another harrier, the wingman of the other harrier as they start returning back to the america-class

Z23 who were watching the aircraft dogfights was amazed of this actions and she smile

Z23: "How exciting! your aircrafts sure do have a mind of their own!" she said as she stare at the battle they are in right now.

Chester: "A pilot always have a wingman even they are unmanned, is always the same" he smile as the fight continues as the Seraphim decided join the fun 

F-18A Hornet aircraft taking off equipped with bombs as 8 aircrafts taking off from the seraphim. 

but... as final wave incoming, the last siren fleet is defending the Oil rigs... but some important person is in the fleet. a girl with a maniac smile and laughing insanely as she watching the mithril fleet.

???: "So this interesting new fleet from the iron blood really start to cause troubles... well then! ready or not! here I come!" she start smiling insanely like a psychopath as she ready to purified her opponents... her name is...

Purifier

Back with Mithril fleet, the loud siren noise coming from speakers alerting everyone to be ready for trouble. "WARNING! WARNING! BOSS SHIP DETECTED" as the speaker said that. Admiral Chester grab his binoculars as he stare at the incoming final siren fleet, many warships and they are seperated, trying go all direction to surround the Mithril fleet but he noticed a girl on the middle with siren riggings on her, along with the fleet. The girls noticed her and they recognized her...

Graf: "Purifier...." she said with angry tone full of hatred toward the siren girl

Tirpitz: "So... she is the one who capture and guarding this abandon oil rigs...." she grip her flag pole tighter as admiral Chester noticed this, hemay know they have bad history with the purifier girl

Chester:  "they are a lot... but... seraphim! commence the carpet bombing!" he shout as the Seraphim citadel glasses glows bright as 3 B-2 Spirit Bombers appeared behind them on the skies. moving fast toward the siren ships, as they are away from the mithril fleet, they opening their bomb bays doors as they start dropping a lane of bombs as the bombs start to explode once they touch the ocean floor. They are modified to blow up on the ocean floors instead going straight in toward the bottom of the ocean, the explosion radius causing the siren ships to taking damaged or blow up, but purifier won't stay their to just take a hit, she start sliding swiftly on the ocean floor, taking distance away from the bombs as she fire her laser beams, direct hit on the b-2 bomber as it exploded in mid air as the siren ships continuesly firing their anti air but not hitting the bomber due it's attitude and insane speed.

Purifier: "Interesting toys you have there! Can't wait to scrap them up!" she shout at them as the siren fleet getting close as they firing their laser beams and projectiles toward the ships, hitting some of the slava class, one slava class got ammo racked on her missile launchers as it exploded, it start sinking to the bottom of the ocean but Nagato-class battleship is the one taking the most hit as the battleship getting hit continuesly and taking heavy damage.

I forgot mention, The 8 F-18As that been launched from the Seraphim Aircraft Carrier, equipped with bombs and diving toward the siren battleships and dropping their payload once they close, the siren warships didn't react of the incoming aircraft as the bombs directly hit on the battleships, exploding as mostly a critical hit that cause them to sink and fading away.

Purifier: "grr..... you going pay for that!" she shout in anger as she charged toward the nagato battleship as the nagato's guns open fire toward her but she easily dodge it because she is a humanoid siren, suddenly she leap up and fires her rigging's weapons, beams shit straight toward the Nagato hulled as it piereced, hitting another slava and causing both of them to sink. 

Purifier: "How did you like tha-!" before she finish her sentence, she got hit on the face by a powerful punch that cause her flying, knocking out unconscious but she regain consciousness as she backflip landed safely on the ocean, she glare at the person who punched her... it was JS Kongo... Chester's Secretary

Kongo: "You surely causing trouble for my admiral's fleet...." she said as she crack her knuckles as her rigging aims at purifier, auto cannons, CIWS, and missile launchers are open and ready to launch. Purifier blinks as she stare at her...

Purifier: "A Sakura empire kansen with the strange iron blood fleet? you have weird rigging... doesn't matter... YOU WILL DIE!" She shout as she start laughing maniacally again as she launch multiple laser beams toward her but Kongo quickly evade her attacks as she move to the sides

Kongo: "Tsk... I show you..." she smirk as she launch several missiles that is immediately locked on purifier, purifier noticed as she leap jump back up. but the missiles quickly goes up and head straights toward her, her eyes widen and quickly fire her beams at the incoming missiles, exploding them but some head straight to her and exploded when the missiles hit her, pushing her back to the ocean floor, her dress quite ruin right now as her rigging damaged, she slowly standing up as she glare at her

Purifier: "Tsk... I didn't prepared to this new ship girl... You win this fight... BUT NOT THE WAR!" She start laughing insanely as a portal appear behind her as she lean back, entering the portal. Kongo fire her autocannon at the portal but it was too late... The portal disappeared once purifier went in, Kongo grit her teeth because she want to kill her.... but she got radio called from Chester

Chester: "You did good Kongo, return to Seraphim." He said with pleased as he is very impressed for her, just enough to make her smile happily as her admiral praised her

Kongo: "HAI!" she shout as she start returning to the seraphim, aftermath of the fight. the oil rigs belonged to the iron blood? nope! is belong to the mithril fleet.

Tirpitz: "I might say... I am impressed, you deserve this win Admiral Chester. we will return to the base to report this. can you guard the oil rigs for us?" she asked as he smile at him

Chester: "Sure Tirpitz" he give her a nod, he planned to make this oil rig place a base of operations. Tirpitz nods as Graf stare at the aircrafts before smiling along with Z23. the trio head back to the iron blood base to report the news

Meanwhile....

Somewhere afar from the oil rigs area, in the Royal navy-IronBlood borders...

???: "Admiral... seems like the Ironblood taken the abandoned oil rigs with a new strange fleet..." she said on the comms

???: "I see... any news? This is the first time I seeing the Iron blood has successfully captured the oil rigs from sirens without using their siren fleet..." she said in the comms"

???: "Ara~ seems like this new fleet is more modernized than the Ironblood admiral, seems like this new fleet didn't belonged to them... looks independent but we noticed a shipgirl is a Sakura empire and a ship is a nagato-class yet it wasn't nagato... plus other ships wasn't a Sakura Empire ships" she said in the radio comms with a smile

???: "More modernized? Sakura Empire kansens in this area... weird.... we must investigate this... Who leading the operations?" The Royal Navy Admiral ask the girl

???: "... to my surprised... a Male with admiral clothing... interesting his handsome, the Three Iron blood shipgirls, Tirpitz, Z23 and Graf Zeppelin returning to the iron blood base to report the operation while the male admiral and his fleet stays behind" she said, the Royal Navy Admiral widen her eyes and surprised

???: "I See.... Interesting... keep on eye on them..." she said before radio cut off, The maid goes toward the battleship shipgirl

???: "you planning meeting him don't you?" the maid ask their flagship

???: "Yes... they might spotted us right now due their siren like aircrafts heading toward us... they are more advanced than the iron blood" she said as she stare the incoming F-18s

To be continued

New ships/weapons unlocked!
Forbin-class Frigate
Perry-Class Frigate
Jolly rogers (F-18A Hornet)
Close Air support

feels weird a author join in the story but nah, that ruins it. anyway thanks for reading, hope you like it!

the feeling of joining quite tempting but I don't want the book be ruined by me, this for the readers, oh yeah i do mentioned ground units in future chapters, i will give details for next time

thanks for reading and also... I might put a list of Admirals later or tomorrow or other day. all the admirals in azur lane are females so yeah.