The Miracle Doctor's Two-Faced Toddler - Chapter 10 - Three Days Agreement

Humanity has been gradually transported to the Abyss by a bored god to compete against other races and monsters.The problem is… humanity failed. In a last desperate push the strongest survivors chose a comrade to travel as far as possible back in time.

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 social worker father and his adult daughter crash land on a desert full of crystal plants and little else. The city walls of Ar'Kendrithyst rise in the distance, but as the pair hike closer they see those walls are more like mountains, and the mega-metropolis is long dead. Luckily, the adventuring city of Spur is alive and green and hospitable, and well outside of Ar’Kendrithyst’s shadow.Follow Erick Flatt as he tries to make a nice life with new friends in a new home with his daughter at his side, but this land is rarely as kind as its people, and Erick will need to change if he wants to live the life he wishes to live. What to expect:Slow burn storyline, worldbuilding, father-daughter relationship, Erick is the MC, Jane is the side character, slice of life, numbers in blue boxes but also high fantasy, trying to understand magic, creating new magic, living the easy life but forced into dealing with problems, problems becoming very large, massive changes, traumatizing content, and most of all: character growth.

Brave, wretched, kind, cunning, generous, greedy, elegant, vicious, happy, perverted, honest, prudish…

In this doomsday world, only by winning in the alien battlefield can resources be obtained to ensure the continuation of civilization.

Every soldier who enters the alien battlefield will randomly get a keyword of his own.

If the words and deeds match the key words, various attributes will grow rapidly and obtain superhuman abilities. On the contrary, if the human design collapses, it will quickly weaken;

This is a world of acting skills;

Acting is eating and drinking, acting is glory, acting is privilege, acting is life…

…

There are already completed Wanding works “Dream Master of Ten Thousand Worlds” and “Ten Thousand Ways to Eliminate Players”. The completion of this guarantee is guaranteed, please feel free to enter the pit.

- Description from novelbuddy