The Big Boss & His Dainty Wife - Chapter 414 - Let Me Protect You_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.

Do you know how this world ends?

As the other person’s stand-in, he humbly falls in love with the president.

Xue Yingshuang was a stand-in, and humbly fell in love with Xing Yun…’s salary pay.

As the other person’s stand-in, Xue Yingshuang wishes he could never be separated from the president for the rest of his life.

He is a stand-in, and he must get off work at one o’clock.

The president’s white moonlight came back, other stand-ins were sad, and depressed. They couldn’t handle the jealousy and finally left with a dead heart.

Xing Yun’s white moonlight came back, and Xue Yingshuang had no waves. He enthusiastically served white moonlight and shone brightly at work.

Xing Yun: Little stand-in, is this your little trick to seduce me?

Xue Yingshuang: Misunderstood.

Xing Yun: Do you want to suffer in silence and finally leave secretly, driving me crazy?

Xue Yingshuang: You think too much, how can I leave? I still have half a year of social security before I can receive unemployment insurance.

Xing Yun: ?

Xue Yingshuang: I also haven’t received the year-end bonus you sent me yet.

Xing Yun: ??

Xue Yingshuang: I didn’t get my paid annual leave either.

Xing Yun: ???

Xue Yingshuang: Wait until I get the money and put it towards a vacation.

- Description from Novelupdates

The two faced number one female spy transmigrates to a different world and becomes an outrageous idiot girl. When she woke up, what she had to face was consecutive blows of the decline of her family clan, her crippled martial skills, and her disfiguration. To protect her family, she must obtain the treasured book, obtain outstanding achievements, summon a dark beast army. Wait and see how in this unfamiliar, dark magical continent, she dies and becomes a demon then steps up to the top, making all of the formidable people in the world bow down to her in respect.

- Description from Novelupdates