MTL - Night Ranger - v6 Chapter 239 leader

The villainess sees herself executed in front of a large crowd by the order of the emperor (her husband and the one she loves). However in the next moment after her death, she is back in the past. Monique is sent back into the past because of her brutal memories of her previous life with a prince who was engaged due to their similar age. When Empress grew and looked at the past, she killed her emotions to live as an Empress and remained one emotion, that was sickening affliction. Where in her next life, she made new connections in order to avoid getting executed again…

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 the end, war couldn’t be extinguished. But, there was a transformation. Even in the heart of a worthless accomplice in murder who was indifferently continuing his task, there was a transformation. The massive weapon “Object”.

This was a weapon that changed the whole definition of war. An exchange student named Quenser, who was dispatched to the battlefield, met at the base a girl with a strange aura. The girl, dubbed “Elite”, is the pilot of “Object”. The near future. This diminutive boy had come to take on the role of standing up against the strongest weapon “Object” for the sake of the girl. This was the motive for their first meeting.

Tang Zhou dreamed that he was cannon fodder in a novel.

Because of prejudice, he misunderstood and hurt the villain, and later was framed by his illegitimate younger brother and became impoverished.

After waking up from his dream, he looked at the innocent and harmless young villain in front of him and decided to change his own ending.

*

Fu Shen knew about his past long ago and had been plotting for many years for this reason.

He agreed to Tang Zhou’s harsh demands, pretended to be harmless, and in silence kept a low profile.

The original plan was to turn around and leave naturally after the deed was done.

But unexpectedly, after one night, this person seemed to have changed.

Peeled off the coat of indifference, there was actually a piece of small sugar cake inside.

Fu Shen was born with a sweet tooth, and after having a taste, he couldn’t let go.

- Description from Novelupdates