The Legendary Mechanic (WN) - Chapter 1455: Crushing Dry Weeds and Smashing Rotten Wood

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.

The moment the little tyrant of the nobles, Roel Ascart, saw his stepsister, he recalled his memories. He realized that he was in the world of a gal game he played in his previous life. To make things worse, he was the greatest villain in the common route of the game!

“I’ll be killed by the main character and the four capture targets ten years from now. Is there still any hope for me?”

Just thinking about the fearsome glints of those sharp swords those beautiful capture targets held in their hands, Roel couldn’t help but tremble in fear.

Till a voice finally sounded in his head.

【Welcome to the House Resurgence System】

Jiuling was once the daughter of the crown prince, the princess of a nation. She specialized in medicine and incredibly intelligent, and yet she was murdered. After her death, she actually ended up reincarnated into the body of a distressed orphan girl, Jun Zhenzhen. One of these days, Jiuling was going to go back to her killer and get revenge. However, she had urgent matters at hand that needed tending to, trouble of which was left to her by the previous owner of Jun Zhengzhen.

Jun Zhenzhen was a simple-minded person, an unruly and distressed orphan girl. She hoped to rely on the marriage that her grandfather had arranged and marry the perfect husband in the hearts of many women - the young master of the Ning family. However, the Ning family completely abandoned her and was unwilling to go through with their arranged marriage. Furious, Jun Zhenzhen wanted to pretend to hang herself, but she ended up really dying. Thus, arrived Jiuling.

Having taken Jun Zhenzhen's body, Jiuling quick-wittedly resolved the difficult situation and saved the Ning family from embarrassment and also stood up for herself. Unfortunately, this little feat was just the first step on her long road to accomplishing her revenge...

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The countries of Mephius and Garbera have been waging a war for ten years and are trying to put an end to this long fight through a political marriage between the two royal families. Orba, who was driven from his home because of the war and was forced to become a gladiator, looks exactly like the crown prince of Mephius, and it has been decided he will be substituting him during the wedding ceremony. On the other hand, Vileena, the princess of Garbera, has secretly decided to ensnare the crown prince for her own country’s interests.