My Simulation… Why Is It Turning into a Real Romance?! - Chapter 127: V3 - 23: Then I’ll Go Myself

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.

A recurring nightmare afflicted Khan's nights since the Second Impact. His dreams replayed the scenes of the crash of the Nak's spaceship, an alien race that the humans had defeated five hundred years ago.

A young man dies and is transported all the way back into Ancient Sparta. Underneath all the bravado is a now failing nation after over extension from the Peloponnesian war against Athens. Will the man save Sparta and forge it in his desired image? Or will Persia, Athens, and other city-states or empires crush them!Contains portrayals of real life leading figures and gets to the nitty gritty of the often disgusting and disturbing life's people suffered through in Ancient Greece.Expect a new chapter a few times a week. Total world count 30,000

As the owner of an ordinary bookstore, Ling PingAn’s biggest wish was to muddle through life and do absolutely nothing.