Odyssey of the Blind God - Chapter 206 Gier

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.

Luke a 13-year-old boy lover of all kinds of novels, series, and manga, dies and is reincarnated in Wednesday's world with above-average psychic powers.As he immerses himself in the world of outcasts and monsters, he will discover that it is not as simple as it seems. Luke in his new life is a descendant of the famous writer Edgar Allan Poe and must deal with an old family grudge.

The dark BOSS, who had the fortune of becoming Earth’s last living human, brought with him his loyal, second last human to die, little brother to be reborn.

Xu ZiYan has a little brother, and that little brother is gay. As an older brother, he has always felt a bit regretful.

One day he transmigrated into the inside of a novel and found himself with another chance to raise a younger brother.

Immediately rolling his sleeves up to prepare for battle, he planned to raise this little brother into an exceptionally good man! And a perfectly straight one!

Taking a lesson from his past experiences, he continuously perfected his training plans.

Clearly, he strangled any opportunities to turn his little brother bent in the cradle, yet why was it that the little brother he had used all his heart and blood to raise — was still a gay guy!!!

And he was a gay guy who made him his target!!!

Your father ain’t playing around anymore!

A body you can save, however a warped soul……how do you want him to save it?! What a godly problem!!!

Twisted black-belly younger brother X irritated wifey older brother.

- Description from Novelupdates