Talentless Extra Of The Legendary Hero Academy - Chapter 103: Head Librarian Teresa

Traveling to Blue Star, eighteen-year-olds in this world can enter the island world and become island owners after being tested.

Xu Chengfeng’s awakening talent ability “Life Activation”, even the island world can’t judge the level!

Then, his island came to life!

Others need a boat to cross the sea, and Xu Chengfeng’s island set sail directly!

Relying on the life activation technique, Xu Chengfeng pulled up the invincible army, accepted countless races, and ran across the seas!

- Description from novelbuddy

Six years ago, he disappeared silently! After six years, he becomes the unparalleled "God of War" and returns with glory, only to find that he has a daughter whom he never knew of. Looking at his wife and his daughter, he says, "In this lifetime, I'll bring you the greatest honor and glory!”

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.