Mercenary's War - Chapter 9 - Surprise Change

I was walking to the convenience store and the next moment I knew, I was inside the villain's body!?What is going on!?This world is known as the world of Star Fantasy, a popular RPG that dominated the gaming charts. Tournaments were held all over the world to celebrate the success of this game.The top ten guilds were invited for every tournament to recruit new talent for their teams. Liam was part of the third strongest guild in Star Fantasy. He suddenly woke up as the son of one of the strongest knights in the empire.Arnold von Berkley, who will become one of the greatest villains in the story.He must find out if there are more of him out there. Was he the only one summoned? If so, how can he avoid his inevitable death? By eliminating his death flags!

The world experienced a cataclysmic change, and countless spatial gateways appeared out of thin air.

In a world where everyone has the chance to ascend to heaven and claim the title of the No. 1 God by touching the Stone Tablet, battles rage across the three realms—Heaven, Hell, and Earth.People fight fiercely to climb to the top, each striving for ultimate power and dominance.But me? I’m Ragnarok, and I’m not really interested in godhood.My best friend, Jason, however, has always dreamed big. He wants the two of us to become the Duo Gods of the Universe, with one of us as No. 1 and the other as No. 2.Jason is like a brother to me, and I’ve always had his back. So I’m just going along for the ride, supporting him as he chases his dream.What neither of us knows is that I’m the strongest being in existence—a power even I’m unaware of.Join me on this thrilling journey to godhood as I uncover the truth about my strength, fight alongside Jason, and face challenges across all realms.

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.