The Female Assassin Pretends to Be a Lamb in the Campus - Chapter 57: Qin Hanyu: The first time, Really not used to"

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.

Having transmigrated into a little farmer girl, her father passed and her mother turned crazed. Facing a frail household, Qian Yixiu remained calm, her rise relied on strength, and also on the luck she had when being a “ghost”.Together with her younger brother, she strived to build wealth with one hand and protect her beauty with the other...

Rafael Callahan is a renowned Knight of the Castro Kingdom. After weeks out to fight against enemies and bring peace to the kingdom, Rafael returns to his estate where he meets the new maid Annalise Woods.Strange. Brazen. Bold. Three words he would use to describe Annalise. Love should be the last thing on his mind when the King, Tobias Castro, is requesting his help safeguarding the border, but Rafael finds himself drawn to Annalise.Annalise Woods is a maid for the Callahan household. Little is known about her family and her intentions for sticking close to Rafael. She had one goal when stepping foot in the Callahan estate, but soon finds herself intertwined with a man she should never love.Quiet. Annoying. Loyal. Three words she would use to describe Rafael. Annalise knew she should never return Rafael’s love because the moment he learned who she truly was, his gaze upon her would change.Tales of Castro Nobility story timeline order -The King’s Unbreakable WifeThe Knight’s Mysterious MaidThe Duke’s Masked Wife