D.E.M.O.N.S: Getting Summoned Weekly isn't so Bad - Chapter 16: What Kind of Succubus Calms People?

A scientific genius named Thomas Harrier was transmigrated to an imperial prince body after a car accident that took his life. He found out that he is in a world similar to our own with a timeline akin to early twentieth century. The body that he is occupying was the imperial prince of a failing empire who suddenly rose to power after a successful assassination attempt of his father. Unaware that the attack is just the beginning of what is to come. He faces many challenges throughout. Will Thomas Harrier be able to live his second life in peace while running an empire and getting it back to its former glory? Or will he succumb into a conspiracy lurking within the country's borders?

Expect some:

Cold war era techs.

Super battleship with advanced electronics, propulsion, and fire control systems?
Helicopters?
Missiles?
Modern medicines and equipment?
AC-130?
A nuke?
Challenger or Abrams or Leopard?
F-4 Phantom or MIG-21?
Colored TV's.

Everything!!!

PS. Cover not mine, I just found it on google.

Humans finally did it. They finally discovered Space teleportation technology!With space portals, transportation and space exploration became easier. It was finally the time when things were looking up for humanity.Until the gates to the Abyss were opened!Powerful beasts came into our world causing mass destruction and terrifying causalities.All seemed to be lost, but that was when the first mages were born. These were humans that could summon terrifying powers and control the elements.…Drake had been living his life as a regular human; a non-mage. However, even though he was a non-mage he had mastered every weapon. All of a sudden was attacked by a terrifying pain that made him think he was going to die. There was a crack in the seal!“You are a Mage!”He was shocked when he finally confirmed this statement....Name: Black DrakeAffinity: Cosmic EnergySkills:Libra constellationAbility’s: Eye of Order: Disperse, Invert order, All equal before orderVirgo constellationAbility’s: Stamina x10, Master of all Elements.Elements controlled: Barrier Energy, Mental energy, Healing energy, Radiant moon energy, Earth energy, Gravity Energy…Aquarius constellationAbility’s: Cosmic armor (Every attack received is like a drop of water disappearing into the sea of stars)Sagittarius constellationAbility: Accuracy (always hits target)Taurus constellationAbility: Rage (Attack Power x10)More…...Drake steps into the world of mages, with all kinds of powers.Vampires, Werewolves, Dragons, Magical beasts, Demons, Abyss Devils and more he will encounter them all.Drake must master his cosmic power and awaken his abilities to protect all that is dear to him together with his friends in this new world.

[Trigger Warning: This dark fantasy romance contains mature themes.]---BLURB:IN A WOLD OF FORBIDDEN LOVE AND HIDDEN TRUTHS, ONE WOMAN'S DESTINY WILL CHANGE EVERYTHING.Ovelia’s life is shattered when she is sacrificed by her family to secure peace between humans and werewolves. Bound to Ace, the future Alpha King, she enters a marriage built on duty, not love. But when Ace’s wolf chooses her as his mate, their fates become intertwined in ways neither could have predicted.As Ovelia navigates the treacherous world of werewolf royalty, she faces betrayal, kidnapping, and the lingering shadow of Ace’s past love. But the greatest danger lies within herself—a secret heritage that could destroy the fragile alliance between werewolves, witches, and elves. When Ovelia’s true identity is revealed, she must flee for her life, only to discover she carries a new hope for the future.With war looming and enemies closing in, Ovelia and Ace must confront their pasts and fight for a love that could unite their fractured world—or tear it apart forever.---

Transmigrate to the world of One Piece, reincarnate as Saint Imu; Control the world government and sit on the throne of the void.He obtains the star map of the omniverse and contemplates the sea of dimensions.Gather all individual combat power, military power, financial resources and all material resources to open the star gate, conquer all dimensions, and break the limit of individual power!Unite or be destroyed, how to choose?