Avoid Yandere Constellation - Chapter 136:

A good-for-nothing man married a beautiful girl but was kicked off the bed on the wedding night. Furiously, he wrote a bill of divorce and ran away.
He was schemed a car accident in which he nearly lost his life. However, it turned out to be a blessing. He swallowed the soul that passed through the outer world, thus obtained superb medical skills and martial arts.
Later on, with the silver needles and invincible martial arts, he embarked on the road of counterattacks and was committed to his great dreams.

- Description from Novelupdates

As the ruler of a munitions empire, Tang Mo unexpectedly fell and was transported to an entirely different world, where he also unexpectedly acquired a “King of Munitions” system.In this underdeveloped world, Tang Mo relied on the abilities granted to him by the system to drive the development of the entire world.After all, the desire for civilization conquest had always been the driving force behind progress, and life had continuously evolved between attack and defense over tens of millions of years...So, selling assault rifles to these archers and training knights to be tank operators... there shouldn't be any problem with that, right? XD

Reborn and returning, he possesses medical skills, can practice immortality, has a slave who is the king of killers, and a maid who is the school beauty pursued by everyone. Even casually taking out a piece of trash can shock the world. His return has set this world ablaze.

22nd Century. An era hailed as the Age of Advancement and Peace.And for the better half of the century, it was an era where humanity lived side by side with alien races, their united empire ever expanding and flourishing.But the peace that everyone thought would last forever was taken by the very people who swore to keep it.The entire galaxy was plunged into war, a conflict fueled by the insatiable greed of those at the top, hidden behind the age-old lie that the enemy wished to destroy them.Vlad Igor was just another nameless soldier in the galactic war, a conflict that stripped him of everything he held dear, first his peace and then his family.When he thought the senseless war was over, their rulers betrayed him once more, taking away his hope.Vlad died, and as Darkness engulfed his senses, he thought he could finally rest, but fate had other plans for him.Sent back in time, Vlad found himself in the beginning of when everything began, when the first embers of the great war were just beginning to ignite, shaping the future that took everything from him.Vlad could now enter the world of Ascension and, with his knowledge and experience, amass power and influence that could possibly prevent the war.But can Vlad, a lone man, stand against the Titans who rule hundreds of stars, command billions, and will stop at nothing, pay any price, to keep their grip on power?