Steel and Sorrow: Rise of the Mercenary king - Chapter 75: Preparation(3)

A teenager named Evan Mason was reincarnated into the magical world of Harry Potter and goes to school at Hogwarts!

With only his knowledge of the future and great talent for magic, he takes the path towards the top of the magic world, only to realize that ever step he took, changed everything!

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.

Bound together by an imperial arranged marriage, Li Yuyan is scorned for her association with the ill and blind crown prince. Publicly, she stands up for the seemingly gentle and perfect prince, and he in turn protects her from criticism. Privately, she contemplates inheriting a fortune if he dies, while he considers eliminating her if she steps out of line. Unknown to all, the beauty and brilliance they keep hidden will unveil. During their wedding night, as she cures his blindness and cold ailment, but not his secret illness, she discovers the deceit. Realizing she's been tricked, she tries to flee, only to find herself trapped by him as he expresses his fascination with her.

When she was ten, she said, “When I grow up, I want to be the President!”“It's impossible, but you can be the President's wife,” he replied.He gazed at her tenderly. His youthful eyes filled with deep affection, as if he wanted to give her the whole world.When she was thirty-three, due to a leak of military secrets, she was imprisoned for treason, and she saw his signature on the death sentence document.She finally understood that the so-called undying love was fake, and that power and status were the true goals.Love is just like a ghost—more talked about than seen....Reborn and back to the age of twenty, she opened her eyes and shouted, “I must be the President!”“But, Madam... Your husband is already the President,” someone said.She was stunned for only a second, then viciously replied, “Then I'll take him down first, and I'll become the President!”A man gently pushed open the half-closed door, chuckling softly, “Did I hear wrong? Sweetie, you want to... take me down?”