SorryImJustDiamond

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!!!

Donation link: https://ko-fi.com/sorryimjustdiamond

PS. Cover not mine, I just found it on google. If you are the owner and want me to take it down, then you can reach me in the comment section.

Reincarnated as an Imperial Prince

After the speech, Alexander left the balcony and shook hands with the Imperial Council who attended as well as the elites who are prospecting to invest in his grand ambitious plan.

Sevastian was the last person he shook his hand with, who was beaming a smile.

"Your Majesty, the speech is magnificent. Your use of humanity's invention over the course of a million years struck our hearts. And the last part where you declared we are going to the moon sends chills to my very being. Oh, Your Majesty, there are no perfect words to describe how jubilating your announcement would be to your people." Alexander cringed at him for his over-the-top praise.

"Sevastian, please act properly. Your vehement praise has made me feel quite uncomfortable. Truly it is embarrassing."

It's All Part of the Plan