The first alarms echoed across every surviving command center on Earth at precisely 0400 hours.
The message appeared simultaneously on military displays, civilian emergency broadcasts, orbital stations, and every resistance communication network still functioning.
OPERATION MOONFALL HAS COMMENCED.
For a brief moment, the world seemed to stop breathing.
Then humanity moved.
Thousands of engines roared to life.
Across continents scarred by decades of war, armored columns emerged from underground bunkers and hidden mountain fortresses. Heavy tanks rolled across shattered highways that had once connected thriving cities. Missile carriers followed behind them while mobile railgun platforms locked onto orbital trajectories.
Every remaining nation had answered the call.
Old flags still flew over different divisions, but no one marched for borders anymore.
They marched for Earth.
Far above the battlefield, the Black Cathedral floated like a second moon.
Its impossible architecture twisted against the sky.
Gigantic black spires pierced the clouds.
Floating rings rotated around its immense central tower.
Dark energy poured from its foundations in endless streams, corrupting the atmosphere beneath it.
Every few seconds another dimensional tear opened around the fortress.
Monsters descended through them without end.
Winged horrors.
Towering giants.
Living masses of corrupted flesh.
Creatures with bodies too enormous to belong to any natural world.
The Cathedral continued feeding the invasion.
If it remained standing...
Humanity would lose.
Inside the Unified Command Fortress, General Mara stood before the largest tactical display ever assembled.
The holographic battlefield stretched nearly thirty meters across the operations room.
Blue lights represented human forces.
Red lights covered almost everything else.
Kai entered quietly.
His armor still carried fresh scars from previous battles.
Adaptive plates shifted across his body as if alive.
His crimson eyes settled on the projection.
"So this is everything," he said.
Mara nodded.
"Every soldier."
She zoomed the display outward.
Millions of blue markers illuminated the continents.
"The last armies."
Silence filled the room.
There would be no reserves after today.
No hidden fleets.
No secret weapons waiting underground.
Everything humanity possessed had been committed.
Everything.
Ken stood beside the command table.
The weight of leadership rested heavily on his shoulders.
He looked older than he had only weeks earlier.
War had stolen whatever youth remained.
"The Cathedral controls the dimensional gateway," he began.
"If we destroy it, reinforcements stop."
A new hologram appeared.
It revealed the structure's interior.
"The central reactor lies beneath the throne chamber. Lira studied the image.
"Getting there won't be easy."
"It isn't supposed to be."
Ken enlarged several defensive rings surrounding the fortress.
"Every layer is protected by elite guardians."
He pointed toward the center.
"Kai and I lead the strike team."
Mara immediately objected.
"You should stay here."
Ken smiled faintly.
"If I stay here..."
"...everyone dies."
No one argued again.
The assault began exactly at sunrise.
Thousands of artillery batteries fired together.
The horizon vanished beneath continuous flashes.
Shells screamed across the battlefield.
Entire mountain ranges shook.
The first wave of monsters disappeared beneath walls of explosions.
Moments later...
Orbital cannons fired.
Beams of concentrated energy descended from surviving satellites.
Columns of brilliant white light carved through enemy formations, vaporizing thousands of creatures before detonating against the Cathedral's outer shield.
The barrier shimmered.
It held.
Then the sky exploded.
Human fighter squadrons surged forward.
Hundreds became thousands.
Stealth aircraft.
Hypersonic interceptors.
Drone swarms.
Experimental plasma bombers.
Every remaining aircraft climbed toward the floating fortress.
Missiles launched in synchronized waves.
Bright contrails covered the heavens.
Enemy flyers answered immediately.
The air became a storm of fire.
Explosions bloomed everywhere.
Pilots twisted between monstrous wings larger than skyscrapers.
Railgun rounds pierced creatures from kilometers away.
Plasma cannons illuminated the clouds.
Burning wreckage rained toward the Earth below.
No one turned back.
On the ground, armored divisions advanced.
Tank cannons fired continuously.
Missile launchers emptied entire arsenals.
Mechanized infantry crossed broken terrain beneath towering walkers.
The newest generation of combat mechs marched at the front.
Each stood over twenty meters tall.
Their rail cannons fired with deafening force.
One gigantic beast charged directly into the armored formation.
Its claws ripped through steel.
Three tanks disappeared beneath a single strike.
Before it could attack again—
Eight mechs surrounded it.
Their targeting systems synchronized.
"Fire."
Eight railguns discharged simultaneously.
The impact shattered the creature's chest.
It staggered backward.
Missile batteries immediately followed.
Hundreds of warheads struck the opening.
The monster erupted into fragments of burning crystal.
Soldiers cheered.
Only briefly.
Another wave emerged from the dimensional breach.
Then another.
Then another.
Kai launched himself into the air.
His boosters ignited with blinding intensity.
Ken followed close behind.
Lira and the elite strike team accelerated after them.
Their destination lay directly ahead.
The Black Cathedral.
Enemy interceptors converged immediately.
Kai met them head-on.
His blade transformed into twin energy spears.
He spun through the first formation.
Bodies dissolved behind him.
Another monster opened its jaws.
A beam of darkness erupted.
Kai crossed his arms.
Adaptive armor expanded instantly.
The blast struck.
The armor cracked...
Then absorbed part of the energy.
Red symbols spread across his suit.
Analysis complete.
Resistance acquired.
Kai smiled.
"Your turn."
He fired the absorbed energy back.
The creature vanished.
Ken landed on one of the Cathedral's outer platforms.
The surface pulsed beneath his feet.
It felt alive.
Black tendrils erupted from the floor.
Rhea sliced through them before they could reach him.
"We're inside!"
"Move!"
The strike team sprinted across endless corridors carved from impossible black stone.
Every wall whispered.
Every shadow moved.
The Cathedral itself resisted them.
Guardians emerged from sealed chambers.
Towering armored beings wielding weapons forged from condensed void energy.
The first guardian swung an enormous blade.
Kai caught it with one hand.
The floor shattered beneath the impact.
For several seconds neither moved.
Then Kai's muscles expanded.
His adaptive evolution activated again.
With overwhelming force...
He pushed.
The guardian stumbled.
Ken seized the opportunity.
His energy blade pierced straight through the creature's core.
The guardian collapsed.
Its armor dissolved into black dust.
Outside...
The battle worsened.
Human casualties climbed rapidly.
Entire battalions disappeared beneath endless enemy waves.
Medical stations overflowed.
Ammunition reserves reached critical levels.
Still...
Nobody retreated.
General Mara watched casualty reports arrive one after another.
Thousands.
Then tens of thousands.
She closed her eyes briefly.
Every number represented a life.
Friends.
Families.
Dreams.
She opened them again.
"Maintain the advance."
The officers obeyed.
There was no other choice.
If the Cathedral survived...
There would be no tomorrow.
High above the battlefield, enormous cracks spread across the Cathedral's shield.
Continuous orbital bombardment had begun weakening it.
Human fleets focused every remaining weapon upon the same location.
The shield flickered.
Once.
Twice.
Then sections collapsed.
Cheers erupted across every communication channel.
"Direct hits confirmed!"
"Barrier integrity dropping!"
"Keep firing!"
The assault intensified.
Entire magazines emptied within minutes.
The sky became nothing but explosions.
Deep inside the Cathedral...
Kai suddenly stopped.
He frowned.
"You feel that?"
Ken nodded slowly.
"It knows we're here."
The air grew colder.
The corridor ahead twisted unnaturally.
Reality itself bent.
A massive doorway slowly opened.
Beyond it lay darkness.
Something ancient waited inside.
Something powerful.
Lira tightened her grip on her weapon.
"This wasn't on the map."
Ken stared into the endless black.
"No."
"It wasn't."
A voice echoed from the darkness.
Not spoken.
Felt.
WELCOME... CHILDREN OF EARTH.
The walls trembled.
The Cathedral awakened.
Every monster outside roared simultaneously.
The battlefield froze for a single heartbeat.
Then the impossible happened.
The fortress began descending toward Earth.
Its immense shadow swallowed entire armies.
General Mara's face turned pale.
"If it lands..."
One of her officers completed the sentence.
"...the planet is finished."
Ken stepped forward.
His blade ignited with brilliant blue light.
Kai stood beside him, crimson energy blazing across his armor.
Behind them, the strike team prepared for the final advance.
There would be no retreat.
No rescue.
No second attempt.
Only victory...
Or extinction.
Together, humanity's last hope crossed the threshold into the heart of the Black Cathedral as the Moonfall Operation reached its point of no return.