In an Alternate Reality IV

Hell

All Liberio has been turned into a living Hell. Bodies completely burned to ash. The air dense with the screams of the innocent people running for their lives. Children traumatized by the sight of death.

The Attack Titan turned to the bleachers where all of Marley's generals where. They were all completely frozen in fear. The day they wished would have never come was here. The stomps became louder and heavier as Eren ran at full speed at them. They couldn't do anything even if they tried to run, they couldn't escape his wrath.

With one swoop of his hands, the stands were completely destroyed along with all the Marlyean generals. Gabi and Udo were trembling in horror. Bodies crushed under rocks. Civilians with their heads split open as their bodies were trampled.

It's funny how fast life can turn on itself. From light to dark. Day to night. Horror can strike at any time. Death waits in the shadows. It is only a matter of when they choose to show themselves.

Colt was nearby and came to rescue the two. Colt put them on their feet then they all noticed the state Zofia was in. The upper half of her body was completely flattened by a boulder. What made the sight more terrifying was the fact that her legs were still twitching as her body grasped to what little life it had left.

"Zofia!" Udo yelled as he freed himself from Colt.

As he ran over to Zofia, Udo fell to the ground as a stampede ran over him. Tens of civilians ran over his body until his head caved in on itself which eventually ended with him dead. Gabi watched as his head was flattened. As she watched, her entire body and pupils violently shoot in rage. Tears formed in her eyes out of an anger too pure to be put into words.

"Damn you! Eren Jaeger! I'll kill you!" She shouted.

Out of the rubble, four bolts of lightning struck and the Armored, Cart, Jaws, and Warhammer Titans all appeared.

The Survey Corps flooded in and began killing all Marlyean soldiers in the way. With the help of the Thunder Spears, they destroyed all of Marley's artillery. Mikasa landed on a building and spectated the fight that was about to happen.

"You've got this, Eren. I believe in you. You're the only person who can save us."

*Meanwhile*

Colt and Gabi ran as far away as they could. They ran through the street of Marley that were filled with corpses. Marlyean soldiers riddled with bullets, dismembered limbs, and all the mangled bodies that laid on the floor. Boulders rained from sky and crushed anyone that was in their way.

"Falco!" Colt shouted.

"Where are you?!"

Gabi didn't feel any ounce of anger leave her body and eventually she split off from Colt. Everything around her faded away and the only thing she could feel was herself and her enemies.

Nothing mattered anymore. Gabi plodded through as Marlyean soldiers began dropping dead on the floor and as all the blood splattered everywhere. She looked up to where she saw all the bullets raining from and saw a woman with similar features to her. Gabi made eye contact with her before the woman disappeared from her sights. Gabi looked back down to all the soldiers that where dead on the floor. 

A shroud of darkness covered her face and she curled her hands into fists.

"Oh my gosh...."

"I get it now...I'm in Hell."

Gabi knew what she had to do. She tightly gritted her teeth, picked up a rifle, and ran off.

"I'm going to kill every last one of you!"

-

Back with Eren, the Survey Corps surrounded the area and stood on watch for anything.

"Is he really going to take on four Titans on his own?" Connie asked with an uneasy manner.

"Yes." Mikasa simply responded.

Everyone turned to look at her.

"He's confident in his abilities and that is all that matters."

The four Titans stood still and waited for either or to move a muscle. Eren took a stance and prepared himself.

"Bring it."

Reiner was the first to charge in and began throwing punches that Eren casually slipped away from.

"Seem like you're as eager to die as ever, Reiner. Fine then. In that case, you'll die here and now."

Eren hardened his fists and threw an uppercut at Reiner which sent him flying up. Reiner hit the ground and Eren mounted on top of him and began bashing his face. Eren felt something coming and when he looked to his side, he saw an arrow coming his way. He caught the arrow and stabbed Reiner straight through his skull. In a matter of seconds, one Titan was already down.

He stood up and looked around. He noticed that the Cart Titan was nowhere to be seen and the Jaw Titan was coming straight for him. The Jaws swung its claws, but they missed Eren. Instead, the only thing the Jaws felt was Eren's fist colliding with his head. The punch send the Jaws headfirst into a building and Porco fell unconscious. That was all it took. One punch and he was done. The only Titan left standing was the Warhammer.

Exactly what did they expect from fighting the Founder? It doesn't matter how many are against him. He will always come out victorious. 

The Titan battlefield was surrounded in fire, blood, and bodies. All the destruction. This was day a that will live in infamy. Reiner was pinned to the ground by an arrow, Porco was lodged into a building, the Cart and Beast Titans where nowhere to be found. The only Titan left standing was the Warhammer.

In Marley's harbor, the destruction was far worse. There was no harbor left, no water, no ships. Everything was gone. Armin had a clear view of all the destruction he caused. He could see it all. All the bodies trapped under rubble and all the fire that burned in the crater he created. 

"Are these the sights  you saw....Bertholdt."

There was no taking this back. The war that they will go through will cost many lives. The Gates of Hell that have been opened will unleash monstrosities greater than any Titan. But this wasn't a war that they will fight for themselves. This was a war for the world's freedom.