I Became the Devil Queen's Heart Demon - Chapter 5 Chen Mo’s ’Intention’?

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.

Betrayed. Alone. Forced to survive the deadliest dungeon in the universe. As a Tulland dreamed of adventure. To be someone who sees every-place, goes every-where, and does every-thing. All he wanted was to go beyond the confines of his tiny island. So, when the Church denied him a class, he turned to the only other being that could grant him his wish; The System. And the System delivered. Tulland got Class, but not one he ever wished for. Awakening as a Farmer, he finds himself in the one place where he can grow away from the clutches of the Church — The Infinite; a dungeon whose end even heroes of old have never seen. Armed with what dregs of power the System deigned to give him, Tulland will have to figure out how to survive, and cultivate, the universe’s deadliest dungeon. Expect: + Progression fantasy with actual farming! + A very stubborn MC + Combat! Action! Plants!

Three-and-a-half-year-old little girl, also known as Ann, lived a life of scarcity and hardship in an orphanage, where even a single steamed bun could lead to beatings and scoldings from the headmaster.Just before Ann fainted from hunger, a mysterious and domineering daddy from a wealthy family descends from the heavens and took her home.President Qin sneered, “I will make them pay a thousandfold for the suffering my daughter endured.”With six doting and influential elder brothers:The Youngest Brother was responsible for beating people up.The Second Brother was responsible for saving lives.The Third Brother was responsible for fighting lawsuits.The Fourth Brother was responsible for capturing people.The Fifth Brother was responsible for providing financial support.And the Eldest Brother was responsible for salvation.With comprehensive and attentive service, are you afraid or not?The major prestigious families competed to stand up for the little prodigy: To bully Ann is to challenge the entire Qin family!Even the pet, a wise and future-seeing white goose, refused to be outdone: Protect Ann!Ann stood with hands on hips and said, “Stop arguing, line up properly, and listen to me.”The Qin family: Understood!

Riku Barusak is a hard-working child. Despite possessing an innate superior physical strength and having withstood harsh training she fails to unlock her talent as a spiritualist. The failure results in her being thrown away by her family.

Abandoned, the only ones that extended a hand to her were the demons, the greatest enemies of the human race. Serving under them as a soldier she becomes a weapon of human slaughter, a fiend that should never have existed.