MTL - Great Voyage: Invincible From the Era of Rocks - Chapter 354

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.

Two years after the breakup, he developed misogyny. Being too close to a woman would make him nauseous and vomit.Mo Chen: Why are there ugly women everywhere?The Brothers: ???Qiao Ruoxin suddenly returned, begging for reconciliation and affection.Mo Chen: You say breakup and we break up, you say reconcile and we reconcile? Who do you think you are!She kissed him forcefully, and Mo Chen instantly became tame, like a docile beast.The Brothers: ??? What happened to your misogyny? And what's with that look of enjoyment?Mo Chen: Get out! You're getting a free show and still have so much to say!Qiao Ruoxin: Brothers, help me pursue Mo Chen. After I succeed, each of you gets a billion, and he's paying.The Brothers: ??? You two really are a pair of extraordinary heroes!Mo Chen: You guys created a group chat behind my back?People hurriedly left the group chat......“Little Ghost, Brother is quite easy to coax, just be patient.”A beautiful and badass sweetheart X an abnormally paranoid and irritable CEO

Huang Dan’s pain nerve is innately different from the ordinary people. A little tore in his skin can cause him to sweat all over his body painfully to the point of him unable to make a word out.

Somehow, he began to cross world, following Mr. System to do the tasks…

In the first world, Huang Dan realizes what it means to die painfully and to live to die again.

TL’s summary:
MC suddenly transmigrated and is bind to a system, requiring him to solve mysteries. Born with a higher degree of pain sensitivity, he met different people in the different worlds and learns what kind of emotion smiling is.

- Description from Novelupdates