Love Letter From The Future - Chapter 364: Bread and Dagger (62)

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.

Rhian Locke only wanted strength.To face the monster that slaughtered his parents while he watched, helpless.“I never asked to be your savior. So why should I care?”All he hoped for was to reach a decent rank, hunt that beast down, maybe become a monster hunter, and retire in peace.“I’m not a slave to the gods. I don’t exist to do their bidding.”But the world had made its decision long before he was born.“Patterns are meant to be broken.”------“Boy, I’ve bathed in the blood of your kind. I’ve crushed those stronger than you.”Lightning cracked across the sky. A hammer flew to the hand of a god.“I won’t let a deceiver’s spawn and a whore’s bastard son, stand before me and declare my end.”Rhian stepped forward, blood trailing from his mouth, eyes locked.“I’m not here to declare your end,” he said coldly. “I’m here to fulfill it.”....

Athena Grant,a human,dies in a car accident and becomes Eira Liora,an elf. Transported to the barren and cursed island of Luinmir, a once-thriving land now abandoned.A year ago,their King announced that the island,Luinmir would no longer be under the empire's control. It was well known that the land was barren and poverty stricken...She was abandoned both by her Kingdom and her Father.She wakes up one day with a system.“So what if they were abandoned and deemed cursed,she would show them all the highest peak of knowledge and development. The island's core is broken...fine,she'll get it replaced but this time,the island would become hers to keep,she would make sure of that.”

The eldest daughter of the Yan family, Yan Jinyu, who has been missing for 16 years, has been found. She is brought back from an orphanage by her fiancé, the Second Master of the Yin family.