MTL - Pirates: Doflamingo Stands In the Sky - Chapter 27

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.

They were born with magic, raised in chaos, and trained in sarcasm.Now the royal kids are all grown up—and the world isn’t ready.Between family feuds, resurrected villains, and a five-year-old firebender with an attitude, the palace is basically a magical daycare with crowns. But when revenge hits home and the kids take charge, things get wild, weird, and a little too flammable.Royal duties? Nah.Sibling wars? Always.Saving the kingdom? Accidental.Welcome to the most dysfunctional, dangerously magical, and absolutely hilarious royal family you’ll ever meet.

With the strongest experts from the 33 Skies, the Human Emperor, Lin Ming and his opponent, the Abyssal Demon King were embroiled in a final battle. It ended with the Human Emperor destroying the Abyssal World and killing the Abyssal Demon King. By then, a godly artifact, the mysterious purple card that had previously sealed the Abyssal Demon King, had long disappeared into the space-time vortex and tunneled through infinite space-time, with a loved one of Lin Ming accompanying it.

In the vast wilderness, where martial arts was still slowly growing in its infancy, several peerless masters tried to find their path in the world of martial arts.

A young adult named Yi Yun from modern Earth had unwittingly stumbled into such a world and began that journey with a purple card of unknown origin.

It’s a magnificent yet unknown true martial art world. This is the story of a normal young adult turning into a legendary peerless expert.

During one of our arguments, my younger brother taunted me, claiming that I only knew how to depend on guys to get me through MMOs. In a fit of anger, I was spurred on by his words and decided to defeat my brother without depending on anyone else. By some coincidence, a new game called “Second Life” was about to go on the market and thus I started from scratch as a player. What’s more, I was the first person ever to log onto the game. The beautiful GM told me that I could have one wish granted… Humph! I. Want. To. Become. A. Guy!