Reincarnated As The Strongest Ancestor With a System - Chapter 337 The Dark Monster

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.

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

A soul from modern planet transmigrates into the Naruto globe as well as incorporates with Kakashi's soul after the kyuubi's assault. A brand-new experience starts ...

The youngest, silly fourteenth son of the Yan Emperor had reached the age where he should be given a separated territory now. He rejected the wealthy land, neighbouring the capital city, and instead chose the wildest land in the western region— Liangcheng. Everyone shook their heads and sighed. A fool is indeed a fool. If you go to Liangcheng, you will be killed by barbarians in less than three to five years.

One year later, the watermelon presented to the Emperor as the tribute from Liangcheng in the west was sweet and crispy. There was no one in the palace who did not love it.

Two years later, Liangcheng presented corn as a tribute to the Emperor. The yield was high, and the taste was good. No one in the country could resist liking it.

Three years later, Liangcheng defeated the barbarians and presented their prisoners in front of the imperial court. The people of Yan were excited and their morale was greatly boosted.

Four years later… Everyone said that the fourteenth prince Mingyu was a fool, while the little fatty Yu, who transmigrated with the golden finger, chuckled. Let’s see how you guys look at this fool build his own territory, then.

- Description from Novelupdates