Attack on Titan: Conquering the World from the Underground City

Gray transmigrates to the underground city in the world of Attack on Titan and spends three years largely unifying it.

He awakens the Conquest System, which lets him trade unified territory for World War II-era weapons and equipment, along with the relevant blueprints and technology.

Gray wins over Levi and Kenny, forces Uri into submission, intimidates Rod, infiltrates the Military Police Brigade, and funds the Survey Corps. His power grows stronger and stronger.

After the story begins, he raises the banner of rebellion and unifies the Kingdom of Eldia in one stroke.

Then Gray opens the borders and sells weapons to the entire world.

The power of the Titans is invincible? That's because you haven't seen our planes, tanks, and giant missiles.

Taking advantage of Marley’s unwillingness to accept its decline and the opportunity created by its war, Gray destroys the Marleyan military and unifies the whole world.

Finally, Frieda, Hange, Historia, Mikasa, Annie, and the others all attend his inauguration as world leader.

Gray shouts from the stage, "Starting today, I'm going to create a world where everyone is equal and there are no more nobles. If any of you have a problem with that, you're welcome to become the next Marley."

This novel and its characters are entirely fictional. Any resemblance to actual people or events is purely coincidental. Do not imitate.