Reincarnation: Rogue Husband Here - Chapter 196

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.

Reborn into a failing noble family, Liu Xingchang awakens in a weakened teenage body, surrounded by humiliation and betrayal. Once the revered Sword God of the Northern Polar Heaven Domain, he now faces ridicule from his former lover, Yu Qiuer, who has abandoned him for a rival, and scorn from the very man daring to tread on his legacy.Though his power has diminished to a mere third-grade cultivation, Liu’s indomitable spirit drives him to reclaim his path to supremacy. When he fatally strikes his foe amidst the disbelieving crowd, even the noble Princess Qingyuan is drawn to this fallen “”coward’s”” defiant strength.Can Liu Xingchang resurrect his family’s honor, ascend to the Divine Realm, and turn the tables on those who scorned him?

A normal office worker, Toru Minasuki, was swallowed up by a dimensional fissure and reincarnated into a different world. Upon reincarnation, Toru was given a [skill board] by God. Make the most of it to acquire all the necessary skills! Even though he is an “inferior person,” he’ll make his way to the top!

On her wedding night, framed for infidelity and to be burnt alive?Chu Qianli laughed heartlessly, “I've already written the divorce letter for you, farewell.”Feng Yexuan seized her firmly, his cold and sinister voice cutting through the air, “Thinking of leaving? The only way out is over my dead body!”…The Divine Doctor unexpectedly transmigrated into the unlearned Princess of Prince Xuan, and Chu Qianli only wanted to live an easy life without any ambitions.But she inadvertently caught the attention of the obsessive and insane Prince Xuan and accidentally got spoiled to the heavens!One day.The officials approached with gloomy faces, “Prince, the Princess is causing chaos in the Golden Hall again, please reassert your authority!”Feng Yexuan knelt before his wife with a thud, presenting a “taming husband whip” with both hands, “Lili, I've ripped their mouths for you, can you be a little gentler?”