The Strongest Guild Master Founded a Nation in a Week - Chapter 212 - Mythical Scene

She was forced by her husband and his mistress to jump into the sea and commit suicide, only to be rescued and taken care of by the jerk's uncle for seven years.

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 her past life, she was his personal physician, his junior,Due to the age difference, she could only bury her love for him deep in her heart.An explosion awakened her, and she found herself back in his era.When they met again, he was the noble and aloof scion of his family,She was a village girl with a tragic background.But this time, she would not shrink back,She would bravely pursue her love, making this second chance at life devoid of regrets.In public, he was cold and ruthless,In private, he was a devoted lapdog to his wife,His maxim was, “What the wife says is always the truth.”This story is a one-to-one relationship, with both parties being virtuous and strong.

The age of darkness has arrived.