After Getting Abandoned, I Choose to Become the General's Wife - Chapter 5

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.

An orphaned boy with dreams of making it big through being a blacksmith is given a once in a lifetime chance to succeed when he's taken in by an odd pair - Eggor and Ella. While former teaches him the arts of craft, the latter teaches him the mysticism of cultivation, granting him two paths to tread in this life.

“I can’t believe my eyes. The ice lord actually kissed a man. God, help me!”

All Pete wanted was to be buried in wine grapes. Was that too much to ask?Now he's in a fantasy world, far from home, and stuck underground in the body of a smelly dwarf with fantastic facial hair. The worst part though? The swill that the dwarves are falling all over themselves to drink. Its flat, it's watery, and it has the alcohol content of a rancid coconut. Can Pete save the dwarves from their own Sour fate, or will he be forever doomed to plink his pickaxe away in hopes that he hits the mother lode. Come for the cozy fantasy, stay for the beer puns that will leave you hop-ping mad! A bubbly slice of life LitRPG with love, laughter, and a little melancholy, just like drinking a bottle of Whitbier on the beach. Has some monster fights but no real gore. No elves or harems allowed.