The Vastness of Magical Destiny - Chapter 421: Volume 8 Gathering of the Storms - 11 Military Prohibition

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.

Weird World revival, strange stories unfold. The “Unspeakable” has come to the real world, and those chosen will enter the weird world to represent their respective countries and challenge the Unspeakable.Now, Gu Yi has been selected by the weird world to represent the Dragon Country and challenge the first dungeon world, the Chongshan Hospital, where the death rate is 99%.[Patient Handbook]1. Take medicine on time three times a day.2. Please keep the ward clean at all times.3. People wearing bird beak masks are doctors or nurses, please follow their advice carefully.4. If you see blood dripping from the ceiling in the hallway, do not panic, as this is normal.5. If you notice any equipment damage, please contact someone wearing an elephant mask for repairs immediately.6. There are always two people in the ICU, please keep this in mind.On the back of the page was written in blood: “Do not take any medication given to you. They are a group of demons who will lead you into the abyss.”

Forget about moving to the other side of the world and starting over.The Apocalypse is here!As the only survivor of the Tutorial Quest in his area, Elijah awakens the Class of “Depraved Hero”, an ominous-sounding Class with a Legendary Rank!Additionally, because of the insane difficulty as well as his Clear Rank, he gains the Skills that, according to the mysterious figure that is the Administrator, he needs most.[You have Developed the Skill “Absolute Authority[A]”.][You have Developed the Skill “Slave Mark[C]”.]

A little ruffian who fought recklessly without any morals and bottomline accidentally time-traveled to parallel space and became a Key Case Investigation Team agent. The huge change in identity had him creating chaos in the police station. However, a strange miracle system helped him repeatedly solve mysterious cases, turning him into an impudent ruffian detective!