The Overlord of Blood and Iron (WN) - Chapter 88

Fate, a gatekeeper who had been working for the castle, is beset by a few burdens.

When a fantasy kingdom needs heroes, they skip the high schoolers and summon hardened Delta Force operators.Lieutenant Cole Mercer and his team are no strangers to sacrifice. After all, what are four men compared to millions of lives saved from a nuclear disaster? But as they make their last stand against insurgents, they’re unexpectedly pulled into another world—one on the brink of a demonic incursion.Thrust into Tenria's realm of magic and steam engines, Cole discovers a power beyond anything he'd imagined: magic—a way to finally win without sacrifice, a power fantasy made real by ancient mana and perfected by modern science.But his new world might not be so different from the old one, and the stakes remain the same: there are people who depend on him more than ever; people he might not be able to save. Cole and his team are but men, facing unimaginable odds. Even so, they may yet prove history's truth: that, at their core, the greatest heroes are always just human.

In the era of surging big pirates, pirates are evil? Is the navy justice?

The green pheasant seals the sea, the yellow monkey turns on the lights, and the red dog ignites!

Backed by the three major admirals of the navy, the captain of the Destiny Pirates, the legendary fisherman, the veteran card dog, and the new Pirate Emperor Cui Ze Fite said, of course—

Victory is justice!

- Description from novelbuddy

Beings that create and control monsters and demons, beings that build and reign over malicious labyrinths, the chosen individuals to possess an overwhelming Unique Skill… They are the Demon Lords.