MTL - Transcendent Dawn - Chapter 9 Turned out to be a genius

Gacha – Civilization’s Ultimate Game.

Spin now for a shot at fortune.

Spending that doesn’t disrupt your lifestyle? That’s virtually free-to-play.

Keep spinning until you strike gold – success is guaranteed.

…

…

Today, yet again, I’m at the gacha wheel.

“Did I get a 5-star?!”

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.

What would happen, if one day fantasy collides with reality?

- Description from Novelupdates

The Story of One Continent ~Allison and Wil and Lillia and Treize and Meg and Seron and Everyone Else~ is one final send-off for the long-running series of novels by Keiichi Sigsawa that includes Allison, Lillia and Treize, and Meg and Seron.

As this is a sequel that involves characters from all three series, you are advised to read all of Allison, Lillia and Treize, and Meg and Seron before diving in.