The Wealthy Eldest Sister Rules Supreme - Chapter 448 - 435: Can Only Help Up To This Point

After his fall, the Duke who was distant with his wife and daughter recalled his memories of another world. With a new perspective on life, he swore to cherish and protect those two.

A normal office worker, Toru Minasuki, was swallowed up by a dimensional fissure and reincarnated into a different world. Upon reincarnation, Toru was given a [skill board] by God. Make the most of it to acquire all the necessary skills! Even though he is an “inferior person,” he’ll make his way to the top!

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.

“Shying away from your wifely duties, little wife?” He questioned in a husky voice, lowering his face to hers.Ariel quickly turned her head away, “No, Mr. Chaz, you're misunderstanding me again,” She voiced quietly.Aiden scoffed, not believing her. He looked down at his chest and found her slim hand still placed against it.“You're quite corny, Ariel. Saying you don't want me, yet you're hands are all over me,” Aiden whispered in her ear.***After overhearing her father and stepmother planning how they were going to marry her off in place of her Stepsister to the unsuccessful son of their debtor. That night, Ariel plans her run away, but that same night, Ariel mysteriously gets kidnapped.Waking up to discover she'd been kidnapped by the same people she was trying to run away from made her life seem like it had hit rock bottom.Now, she was going to be forced into a marriage with a man she didn't know and didn't love. But, would everything remain the same for her when she discovers that her new husband was the richest Billionaire in the country?Chaz Aiden was a successful billionaire with billions of businesses all over the world and zero interest in women, especially after his mother had divorced his father for a richer man. When his grandmother asked him to do him a favor by marrying the Hudson family's daughter, he knew it was for the sake of greed.He swore to make his new wife's life a living hell, making sure he reminded her that she would always be an object he purchased, contracted and never to be loved.