MTL - Dragon Emperor, Martial God - Chapter 1869 2 Kings

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.

Getting the [Boosted Gear] is expected for Issei. What if he gained it a month early and another one as well? Let the Games Begin... IsseiXHarem (if it wasn't, it wouldn't be DXD). Now has a TVTropes page! Getting the [Boosted Gear] is expected for Issei. What if he gained it a month early and another one as well? Let the Games Begin... IsseiXHarem (if it wasn't, it wouldn't be DXD). Now has a TVTropes page!

Facing bankruptcy, a beekeeper crosses over into a magical fantasy world, gaining the ability to control bee swarms. Leveraging magic, he cultivates diverse mutant bee species: efficient honey-collecting bees, formidable combat bees, and entirely new bee species with extraordinary abilities.He explores this fantastical world, bringing back various nectar-bearing flora for cultivation, creating magical honey imbued with enchanting effects, and distributing it to all corners of both worlds. While he becomes renowned as the Honey King of his original world and an elite beekeeper, his fame also spreads in the magical world, where he’s known as the Bee Whisperer of the Black Forest.The latest edition of the “Black Forest Adventure Guide” specifically warns: “Never attempt to provoke him, or his bee swarms will not spare you! Don’t ask me how I know!”

All humans transmigrated to a parallel world, where every one of them was a king with the territory.

They participated in a game called The Ranking of Kings and fought to become the best nation.

The rankings were determined based on various aspects such as military, technology, commerce, culture, and religion.

In the game, the kings would awaken different attributes of the land.

Someone exclaimed, “My Renewable Resources attribute allows me to enhance raw materials such as timber and minerals. I want to build the strongest empire of commerce!”

Another king challenged, “My King of the Undead attribute allows me to summon dead souls to fight for me. Who dares to stand in the way of my troops of one million undead?”

The third king declared, “My Integrated Production attribute will ensure that technology is being implemented efficiently. You foolish barbarians, watch as my nation advances a few centuries ahead of yours.”

The fourth king said, “My Miracle Summon attribute can increase the efficiency of evangelism by 1000%. I look forward to the day when my nation becomes the top religion in the world.”

…

Li Xiang revealed a pondering look as he looked at his attributes shown on the virtual data panel.

[Attribute 1: Devils’ Den (SSS rank, unique)]

[You acquired the original birthplace of the Dragon Clan. All the legendary dragons are now under your command.]

[Attribute 2: Devouring Lands (currently A rank, evolvable)]

[When you annex the territory of other kings, you seize their attributes as well. Furthermore, you can level up these attributes to even higher ranks.]