The Demon's Soul - Chapter 59 Inner Demon- Part 1

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.

“I am Yang Jian. By the time you read this, I've already been dead...”A strange parchment, an eye that peeks into the darkness. This is the memoir of a person who survived.

The Zhuang Lady sent her dog, Yin Huayue, to keep an eye on him and confine him. She is cold-blooded and hypocritical, and always has a fake smile on her face. Helping him get ready, combing his hair, and lighting the lamps. Awake for twelve hours a day, Li Jingyun spends ten hours thinking about how to make her leave. But after that, she actually left. He became anxious.

Despite our brief time together, we are not appreciated despite our strength. Rather be alone, instead of withering alongside with another.

- Description from Novelupdates

[Love After Marriage + Nausea and Vomiting of Pregnancy (NVP) + Flash Marriage + Sweet Pampering]A calm and self-possessed business tycoon vs. a highly intelligent, pitiful medical studentLuna Axton, for whom even a twenty-yuan milk tea was a luxury, never expected that one day she would get pregnant and marry into a wealthy family!On the first day of their marriage, he said, “We are just using each other for mutual benefit. Don't expect anything more.”On the Nth day of their marriage, he said, “Wifey, please give me a kiss. I'll take care of the baby, I'll wash the diapers! In my eyes and heart, there's only you and our little one.”Before marriage, she couldn't even afford a cup of milk tea; after marriage, the tycoon's whole family takes turns pampering her! Not only was her mother, whose life was hanging by a thread, cured, but even during childbirth, a master of traditional Chinese medicine begged to take her pulse!Some people mocked her for climbing the ladder through improper means, for her humble origins, and for being foolish and dull.Blaze Fairchild: “I proposed the marriage, I chose my wife. Don't you know I'm the one who got the better deal?”A certain ambassador plenipotentiary: “Luna Axton is my beloved daughter, born with top-tier specs in every way!”As she secretly marveled at how lucky she was, the aloof President Fairchild wrapped his arms around her waist and coaxed softly, “It's not that you're lucky. Meeting you has used up all of my luck.”