My Evil Stepson System - Chapter 225 . Deimos.

Having transmigrated into a little farmer girl, her father passed and her mother turned crazed. Facing a frail household, Qian Yixiu remained calm, her rise relied on strength, and also on the luck she had when being a “ghost”.Together with her younger brother, she strived to build wealth with one hand and protect her beauty with the other...

Abandoned at birth in a humble stable, Shirone was raised by commoners—but he was anything but ordinary. Blessed with remarkable insight, he taught himself to read at a young age. A fateful visit to the city introduced him to the wonders of magic, igniting an unshakable dream of becoming a mage. Yet, beneath the city's dazzling facade lurked a ruthless social hierarchy, where power and privilege crushed those who dared to rise above their station. As Shirone uncovers the world's darkest secrets before even coming of age, one question remains—can he defy fate and claim his destiny as a mage in a world determined to keep him down?

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.

The Night Killer was a notorious serial killer with an indestructible reputation transcending across all nations, targeting corrupted nobles and their subordinates. His resilient ambitions to exterminate the monarchy and destabilize the relations between the nobility and its monarch made him do unspeakable things, going as far as to bed the Queen with the aim of controlling the royal court.

Due to his 'carelessness', he was ultimately arrested and brought to kneel among the people, ending his bloody reign of terror.

Having foreseen his inevitable doom, he had made preparations in advance. He had ordered his closest companion to end his life on the day of his execution.

Having been reborn into the body of Ren Ye, he was met with the presence of an adorable little girl in his life, calling out Papa whenever she sees him and giving kisses on his cheeks.

Likewise, a system was awakened inside of him, and evil transmigrators ascended on Earth, threatening the safety of him and his beloved.

Follow along his journey from a callous and ruthless murderer to becoming a warm and loving father to his daughter, while fighting off evil forces and keeping Earth a peaceful place for his family to live.