MTL - Another World’s Versatile Crafting Master - Chapter 1275 Lord

She was forced by her husband and his mistress to jump into the sea and commit suicide, only to be rescued and taken care of by the jerk's uncle for seven years.

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.

A story about a history teacher gaming-addict with familial trauma, and a peculiar woman seemingly stuck out of time and beyond out of touch.The two have been thrust into the weird and whimsical world of Altros, a planet with divides born of very real superhuman strength cursory of an odd ranking system, and, naturally, species differences.Not exactly the best of news for our resident Scottish history teacher whose ears have changed into fox ones alongside his nine new fluffy tails.First though, Darren, or Lone, or whatever else the weird system claims he's called, has to figure out how to live with his new companion Sofia, for seemingly forever while also just barely managing to survive being stranded on a monster-infested island with a self-proclaimed former-immortal who can see despite being blind, can freely teleport, and who also, of course, seems prone to experience bouts of extreme depression.Not an ideal situation when he himself hasn't been in a great headspace for over a decade now. But hey, at least there's an incredibly expansive litRPG system to keep the both of them entertained, right? That'll fight off the fear of death, surely.

In short, MC inadvertently created a world, but as the creator of the world, he did not know the world at all. He should have lived here like a fish in the sea with some plug-ins that MCs always have. But now he is even stumped by the bugs in the instant world. Luckily, in this world he has found his shadow guard, or his lover? So the daily adventure is getting not so boring…

- Description from Novelupdates