Spending Noble with a system - Chapter 10: Ancient Powerhouses

[Mature Content] Divorced and in debt, Elena decides to become the contract wife of three rich and famous men. A fair exchange begins between a woman disillusioned about love and men with their own demands and desires. But when they demand for more than her body, she discovers many dark truths as the past slowly catches up to her.

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.

In his past life, he climbed to the 69th floor, and reached the limit of his potential.

Now, reborn, he has returned to the past, when the almighty Tower first summoned him. He will work his way up again, step by careful step.

This time, he will climb to the top.

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This was the great era of vast warships and the Star River, a time when the multi-universe was shattered and countless Cosmic Fragments were scattered across the void, forming the boundless Shattered Starry Sea.Immortal Domain Dao soldiers, mechanical gods, golden giants, wizard Dominators…An endless array of strange civilizations.Starry Sea Oddity, Genetic Potions, exoskeletal armors, Floating Land Origin…Treasures that could be found everywhere.Spectral Shuttle, Spectral Airship, Spectral Warship, Escort Ships, Battleships, Star-Annihilating Starships, hyperdimensional mother ships…The clearly stratified Xinhuo warships.Song Chi held a Zhu Tian Ruins Market in his hand and engaged in interstellar trade with the countless peoples of the Starry Sea.What? Titanium Crystals are worthless in your Star Domain? I’ll take them all, damn it, this is a strategic resource!You call this a chunk of iron? This is Mixed Elemental Copper, the ultimate Enhancement resource!Ordinary ship cannon? Isn’t this a golden Star-Annihilating Cannon? Quick… I’ll buy it!…Stretching across the stars, starting from the flame of human civilization.