Urban Supreme Wild Son-in-Law War God - Chapter 12 - The Young Master of Dragon Hall

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.

In the City of Crime, one law stands above them all: Only the strongest can live.

Quenser and Heivia came back from their one week vacation. The next stage that awaits the two is the experimental battlefield ‘Madagascar’, a huge island on the east side of the African continent. Quenser and the others have been sent to destroy the second-generation object from the Faith Organization: Trinity Style. The worst tropical night ever begins now!

Heavy Object EX chapters are being released with each volume of the Heavy Object anime home releases (blu-ray / DVD) in Japan.

Jian Heng, who lives in the United States, only wants to make enough money and return to China to retire happily. Unfortunately, by accident, he becomes a poor rancher!

Fortunately, he has an unknown cheat. From then on, Jian Heng started to run his own small ranch, and at the same time added some private goods, so that the group of American guests who came to the ranch adapted to the self-created Chinese style’ There are forceful living habits.

The new book “Small Peasants in the Great Era” is released, welcome everyone!

- Description from novelbuddy