I Just Want to Be in a Relationship - Chapter 20

Travel to the primitive world, open up wasteland and farm land, tame animals and fish, build houses…

Jiang Xuan wants to create a tribe of his own!

- Description from novelbuddy

The messengers of destruction have once again been sent by their god, bearing the promise of apocalypse.Fire consumes everything, heralding the end of worlds— from Asgard to Atlantis, from heaven to hell. Once again, the fist of the god of destruction is poised to crush the very dimensions of existence, drawing ever closer to its goal. Amidst the chaos, a humble foot soldier—an insignificant speck on the grand stage—struggles to survive, fighting to climb towards the top.This is the combined story of Global Demon King: Starting as the Abyssal Dragon—Stronghold Legends and writer creativity

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.

He is the strongest soldier of the Chinese Special Forces, and the ultimate demon in the eyes of the enemy. Now he is disarmed and returned to the fields, returning to agriculture and forestry, hiding in remote mountain villages and enjoying a peaceful life.

However, gold always shines, pure white and rich beauty wants to marry him, the president of Meiyan wants him to be his lover, and the hot police flower always wants to take him as his own, which makes the village chief very headache.

This is the life story of a young village chief with a stunt, soaking in the most beautiful beauties, drinking the strongest wine, and vigouring Niucha’s life.

- Description from novelbuddy