The sudden appearance of Izumi's fleet instantly drew the attention of both sides in the middle of battle.
The angels who were fighting in the sky felt their hearts sink the moment they saw the massive warships.
For a split second, despair spread among them.
They had never seen such advanced technology in their own world.
Naturally, they assumed these were reinforcements from the EXE World.
However, the reaction of the mechanical soldiers was completely different.
The moment they detected the fleet, their expressions changed drastically.
They immediately began pulling away from the angels, retreating in a hurried and disorderly manner.
Because their sensors had already identified the truth.
These warships did not belong to their world.
At that moment, Izumi gave his command without hesitation.
"Everyone—attack!"
His voice echoed across the battlefield.
The next instant, the hatches of the warships opened one after another.
Then—
Countless young girls poured out from the ships and flew into the sky.
They charged directly toward the mechanical army.
The sheer number of them instantly stunned the angels who had been holding the front line.
For a moment, they could only stare in disbelief.
Then realization struck.
Reinforcements.
These were their allies.
Excitement surged through the surviving angels and devils.
Support had finally arrived.
With the arrival of Izumi's forces, the tide of battle changed almost instantly.
The mechanical soldiers here were only B to A rank.
Against Izumi's elite, they were no match.
Perhaps in a one-on-one fight, victory might not be guaranteed.
But Izumi's army did not fight alone.
There were hundreds of thousands of them.
The mechanical troops were overwhelmed in an instant.
Surrounded and crushed, they had no room to resist.
At the same time, Asagi Aiba began her electronic assault.
Streams of data surged across the battlefield.
In an instant, countless mechanical soldiers collapsed.
Their systems shut down completely.
These low-level units had no way to resist her intrusion.
From the moment Izumi joined the battlefield to the end of the fight—
Only a few minutes passed.
Watching the results, even Izumi was surprised.
"Asagi-chan really shines in situations like this."
He smiled.
Far away, seated before the Moonlit Crystal, Asagi heard his words.
Her face immediately turned red.
"It's not like that… This is all thanks to the Moonlit Crystal's powerful processing ability."
"Without it, there's no way I could have infiltrated them so easily."
Her own computer skills were extraordinary, but without the supercomputer supporting her, it wouldn't have been so simple.
Izumi chuckled softly.
"You're amazing because you can bring out its full power."
"Anyway, Asagi, we'll be busy from here on."
"Start setting up the defensive network."
"There's a huge mess here waiting for us."
Even though the mechanical forces had been wiped out, the battle was far from over.
They still had to build defenses and organize patrols.
Thinking about the amount of work ahead, Izumi felt a headache coming on.
Asagi nodded seriously.
"Understood. Leave the patrol network to me."
"I'll design a full defense system right away."
This was her specialty.
As long as computers were involved, nothing was difficult.
In this field, she was the undisputed expert.
Izumi nodded in agreement.
The fleet soon descended onto the continent.
Izumi began dispatching his forces to assist in cleaning up the battlefield.
The mechanical wreckage was all collected.
Everything was stored inside his personal space and handed over to Asagi for research.
With the Moonlit Crystal's assistance, creating their own mechanical lifeforms might not be impossible.
After the battlefield was cleared, Izumi handed command duties to Rias Gremory and Sona Sitri.
They began reorganizing the ruined camp.
The surviving angels and devils were also placed under their management.
Izumi had no intention of getting involved in political disputes.
He trusted Rias to handle the situation and report back.
As for why he didn't leave the angels to Gabriel—
Well, she would probably find it troublesome.
With the help of the students and his army, a fully functional camp was rebuilt in a short time.
Once everything was prepared, Izumi and Asagi focused on constructing the defensive perimeter.
The dimensional gateway to the EXE World was located on the other side.
The enemy had already established a base there.
This place functioned as a relay point.
The EXE World used it as a bridge to invade the Dimensional Rift and ultimately enter the DxD world.
If Izumi had arrived any later, the entire continent would have been occupied.
The battlefield would have shifted directly to the Dimensional Rift.
After surveying the surrounding environment and confirming their position, Izumi began the next phase.
Warships rose into the sky once more.
Centered on their camp, they formed a massive fan-shaped defensive formation.
Patrols would be sent out continuously.
Nothing would be allowed to slip through.
Asagi also deployed newly developed modern magical surveillance systems.
Not only that—
To prevent small reconnaissance units from entering, she implemented electromagnetic countermeasures.
Combined with radar and magical detection, even an insect would find it impossible to pass.
By the time everything was completed, night had already fallen.
Such a massive project could only have been accomplished by Izumi.
With his ability to create matter freely, equipment could be produced in an instant.
With everyone working together, magical defenses were also quickly established.
Once the preparations were complete, Izumi summoned Rias and the others.
Looking at the assembled group, he spoke without wasting time.
"We'll be organizing patrol and reconnaissance teams starting now."
"So prepare yourselves."
Everyone immediately grew serious.
"We didn't come here to play," Sona Sitri said as she adjusted her glasses.
"Just give the orders."
"This is a war that concerns the survival of our world."
The others nodded in agreement.
Seeing their determination, Izumi smiled.
"Good."
Then he began assigning roles.
"Satose-chan, I'm leaving the rear resource management to you." (TN: Now, I'm confused who the hell is Satose)
"No problem?"
The young girl nodded firmly.
"There's no problem, Izumi-oniichan."
"This is something I'm good at."
The war had only just begun.
And this time—
They would not be on the defensive.