Lord of Mysterious Wizard - Chapter 14 - : Sudden Surprise

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.

“I want to be someone who matters. And I want to know what it feels like to be in love.”Ezra sold his soul to the Storyteller for a chance to live in a world of magic. But Oberyn? - he was cast away from his home, shackled by a destiny he refuses to obey.But destiny isn’t the only force pulling their world apart. A surge of wild magic threatens to unravel everything, and neither can control it. If they want to survive, they’ll have to surrender to something even more dangerous: each other.At first, they’re reluctant allies. Then friends. Then… something neither of them is ready to name.Ezra is plucky, affectionate, and full of heart. Oberyn is proud, aloof, and single-minded in his goals. They couldn’t be more different - until Ezra’s Desire System reveals the one thing Oberyn wants more than anything else.In a world where magic bends to will, control is everything. But when fate ties them together, who will be the first to give in?Genres: Transmigration, System, Magic, Romance, (R-18), boyxboy (bxb)

I became a side-character who died in anguish because of her good-for-nothing husband.

If I can’t avoid getting married, why don’t I change who I marry instead?

“Excellent, marriage sounds good.”

“Wise choice. Then let’s have a wedding ceremony that isn’t too ceremonious. Following that, I’ll need you to go down to the Fief and behave like the lady of the house until I call for you. Naturally, there won’t be any time to spend in leisure whilst dousing yourself in luxuries.”

“I’m not marrying you, but your father instead.”

“……Pardon?”

“I’m not going to marry you. Do you have a problem with that?”

[The male protagonist quickly wears a romantic text]
A tyrannical star travels through thousands of worlds to save the female supporting stars who have a miserable ending~
Bawangxing is the chief administrator of the Great Star Sea.
But one day, he found that the stars in his domain had become slack since he went down to earth to experience life.
The light dimmed.
Only later did I find out that it was because I was bruised on the way to experience life.
The ending was tragic and the blow was heavy.
In order to revive the prestige of the Great Star Sea, Bawang Xing decided to save his own stars in person!

Current thinking:
In the 1970s, the playful little bully x the little orphan girl
Youth campus wolf dog x arrogant Xiaojiaohua
The young marshal in the Republic of China x soft and cute female poet
The second generation ancestor of the entertainment industry x Xiaohuadan
Another world girl controls the poor boy x color-blind little sister
Apocalyptic Sick Charm Mobile Warehouse x Super-powerful, Charming Beauty
Substitute Bai Yueguang x bad boy
Demon Lord x Fairy Goddess Doctor
Fresh meat idol small milk dog x sexy and glamorous actress
The irritable and upright little prince x step by step for the daughter of a family
A poor boy in a mountain village middle school x a thorny rose who stepped into a wealthy family
Proud petite sweetheart x cool, handsome and tyrannical
Internet celebrity sister x e-sports brother

Content label: Romance of the Times Sweet Text
Search keyword: Protagonist: Huo Xingchao ┃ Supporting role: Little Xingxing ┃ Others: Daxingchenhai

- Description from novelbuddy