The Scum Villain’s Self-Saving System - Chapter 11

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.

Lucan Ironfist came from a noble family, but he wasn't the eldest son. When his brother became the head of the family and he turned 18, Lucan would become a commoner. A strange rule, but that's how it was. So Lucan began to think of a way to live a peaceful life.As he was considering this, his mother arranged for him to become a priest in another city. A priest didn't have to worry about food or housing, and all he had to do was watch over the temple and the statue.It was easy work, so he agreed and arrived at the city. One day, as he was watching over the temple and the statue, a poor-looking girl came to pray. When she prayed to God, light gathered around her body.Lucan was surprised and suddenly remembered the plot of a certain game. Originally, Lucan was from Earth and had traveled to this fantasy world. When he was on Earth, he played a game with a plot where a merchant family's illegitimate daughter, bullied by her family, awakened the power of a saint.Lucan decided to keep this secret and train the saint so that in the future, he could have an easy life and save himself from any crises.

The world ended.Zombies and monsters rose. Cities crumbled.And Merek? He woke up in the apocalypse with a job that lets him create armor for lingering souls—spirits without bodies, desperate for purpose.Turns out, the dead don’t rest easy. Some are angry. Some vengeful. Others? Just lost. When Merek binds them into steel warframes, they don’t just fight... they evolve.Now, he leads a legion of the undead—ghosts in armor, bound to him by oath and fate.Faction leaders call him mad. Warlords want him dead. And God? If He’s watching, He’s not talking.Merek was supposed to die with everyone else.Instead, he got a support type job no one’s heard of... and a shot at rewriting his pathetic Earth-life.In this world, only the fittest survive.And Merek? He’s got undeads in steel at his side.