I, the Weakest Traveler, Start by Taming the gods of the Old World. - Chapter 157: Pendant to the past.

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.

The Halfling says: curiosity is power.The Dwarf says: unity is power.The Elf says: Magic is power.The Gnome says: creation is power.The Beastman says: slaughter is power.Humans say: authority is power.The Dragon always says: knowledge is power.The Gods once said: faith is power.Lynch stands on the terrace of the All-Knowing Tower, overlooking the Anriel Continent, and gently says:“I”, am power.

A scheme led to a cute baby for them.

Several years later, she met her former lover once again.

The iceberg-like president turned into a big wolf full of desire!

He stayed together with her all the time, disproving rumors with acts.

She only wanted to say that rumors truly hurt.

- Description from Novelupdates

In a world ravaged by ruin, where the land is lifeless, skies are smothered by dust, and sunlight no longer graces the earth, survival is a battle against insurmountable odds. Water is tainted, food is scarce, and mutated creatures lurk at every turn. The remaining humans are caught in the grip of a merciless, dying world.Amidst this desolation, Mu Liang awakens a unique and extraordinary gift: the power to absorb energy and evolve. This ability allows him to transcend the limits of nature, unlocking endless possibilities for the world around him to evolve.A humble sapling, infused with the power of evolution, grows into a towering World Tree that blots out the sky. A small land turtle undergoes an unimaginable transformation, evolving into a mighty, world-bearing creature. A tiny spider? It evolves into a malevolent being, capable of manipulating the threads of fate.With the immense strength of a continent-sized tortoise and the power to command the weather through the World Tree, Mu Liang stands poised to create his own kingdom—a world of limitless evolution, where nothing is beyond his reach.This is the story of a man who, in a shattered world, harnesses the power to rewrite fate itself.