MTL - The Untouchable President - Chapter 23 Looking for the door

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.

Born as the thirteenth son of the grand Kingdom of Ironhelm, Prince Liam is far from being considered a contender in the race for the throne. With his father, King Elijah Orlean, having only eight years left to choose the next heir, Liam’s prospects are slim. Seen as the boy with the least mana talent, he is overlooked by the court, his siblings, and even his tutors.But appearances can be deceiving. At just thirteen years old, Liam is secretly an Expert Mage, capable of wielding magic with precision and power that even the most talented in the kingdom would envy. Determined to keep his abilities hidden, Liam embarks on a path of quiet preparation, honing his skills in secret while navigating the dangerous political intrigue of Ironhelm.

As the second daughter of Ningyuan Army General, Qin Wanru, who had been set up by her so-called mother and elder sister, lost her reputation and suffered a lot on her wedding in her previous life.

Now she was reborn and returned to the time before she married to Qi Tianyu, the first son of the magistrate of Jiangzhou.

The rebirth gave her a chance to revenge on her own wedding and uncover the plot of her mother and elder sister. Would she be able to change her fate?

- Description from Novelupdates

Jiang Chaosheng has passed the book. The male protagonist is the reborn prince with excellent luck, and he is the cannon fodder prince who is destined to fail in the palace fight. He is about to be sent to the desolate island in the extreme south, and the fiefs are less than 100 people.

Jiang Chaosheng sunbathed salt, fished… He soon prepared abundant supplies for the rest of his life, but there was an accident when he was eating and waiting to die. He was slow to discover that there were fish thieves in the house!

Jiang Chaosheng set a trap and successfully caught the fish thief on the spot
It was a beautiful merman with eyes like emeralds and hair like sapphire
The poor little merman has a slender waist, glistening scales, and a pitiful posture: I can’t afford the supplies, but I can be your wife and give birth to a little mermaid to repay you
Jiang Chaosheng: Also… not impossible
After a long time, Jiang Chaosheng learned that his wife is actually the villain of the original text, the psychological shadow of the male protagonist Long Aotian, the King of the Sea who is rich in the sea.
The lucky salted fish attack vs the cruel shark emperor
Content tags: childbirth, spirits, ghosts, sweet texts, through books
Search keywords: Protagonists: Jiang Chaosheng, Ji Xuanbing ┃ Supporting roles: ┃ Others:

- Description from novelbuddy