The Villainess turns the Hourglass - Chapter 176: Lie For Lie, Part II

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.

Collapsed without warning, and upon awakening, he found himself back in his childhood.He thought it was a blessing from above, but unexpectedly, tumultuous changes ensued, shrouded in mystery...

In Eylille, a bustling metropolis renowned for its strategic position at the sea’s estuary and vibrant trade, the ambition to thrive attracts many from surrounding counties. However, Limond stands out as a place for those lacking ambition. Amidst this backdrop, Yu Huazang, a high school senior from a challenging background, faces a critical mock exam in Liberty School.Despite the school’s low expectations for his class, Yu’s life is more complicated than his teachers realize. Raised in an orphanage and later by a kind old man, Yu now supports his family by working night shifts, which affects his academic performance. During the exam, he makes a desperate guess on a question, inadvertently activating a mysterious “”God Level Choice System.”” This system presents him with choices that could alter his fate, starting with a simple decision on the exam that promises a novice gift bag as a reward. As Yu contemplates this unexpected turn, readers are left wondering: What is this system, and how will it change Yu’s life?

This is a story of a little man who walks forward silently, in awe, and strives to chase his dream.

- Description from novelbuddy