The Undetectable Strongest Job: Rule Breaker - Chapter 379: Side Story: Alice Sunborn’s Travels

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.

One of the world’s top killer who was fed up with his life tried to retire and live as a security guard at Jiang Yuan University. He only wanted to adapt to the life of an ordinary citizen and blend into the society. However, he didn’t expect that a random encounter with a beautiful girl, who was also the prettiest girl in the university, will become the key to a fierce pursuit, and at the same time, all kind of beautiful women, as well as powerful enemies came into his life.

Let’s watch over the journey of this Versatile Security Guard. Let’s see how he will obtain various beautiful flowers and eliminate his enemies and step on the head of powerful villains.

I only wanted to be a small security guard, Xu Taping said while lying in the lap of a beautiful flower.

- Description from Novelupdates

Young Lin Yi, betrayed by his beloved, had his core taken away and became a pariah despised by all.At a fortuitous moment, Lin Yi acquired the ancient legacy 'Chaos Sword Body Technique', rising against the odds to embark on a path of revenge!“Those who have wronged me, Lin Yi, shall be repaid a hundredfold!”

“Why did you have to get married to me then if you knew you were going to throw me away!” She yelled.He exhaled gently and faced her, his face blank, his eyes surprisingly cool.“That's because, I had to save my crown and my throne. Now, let me live my life.”“Why did it have to be me?” She palmed her face.“You know she's my fated mate and there's nothing I can do about it.”With tears in her eyes, she slowly picked up herself and nodded.“I'll sign the divorce papers.”•••Nyx is torn with grief, when Alpha Oberon, her husband decides to divorce her after he claims to have found his fated mate.She leaves the pack out of the fear of returning back to her abusive and cruel parents and raises her child all by herself.Years race by, with the new Luna not being able to produce any heir for the kingdom. A seer tells the king that he has a heir who has the king's blood running in his veins.What happens when he realises the child is from the very woman who once offended? What will he to do convince her to come back in order to save his throne and kingdom?