Beautiful Wife from Heaven: Mr. Qi, Let’s Get Married - Chapter 174 - : You Don’t Seem That Capable

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.

Cote: There is Something Wrong With HikigayaBy: XiaokoPatient Profile:Patient: Hikigaya Hachiman, Year 1 Class D, Tokyo Metropolitan Advanced Nurturing High SchoolDiagnosis: Adolescence SyndromeCondition Overview: The patient claims to have woken up in a parallel world, where both his physical age and relationships have drastically changed!Yukinoshita Haruno is now his classmate.Shizuka-sensei is somehow teaching at Sobu Middle School...And before he knows it, he ends up in a prestigious school with a 100% graduation and employment rate, stepping onto a fate that even destiny itself cannot predict!

One day, Zhang Fan, a poor medical student, receives a medical system from the future. This turns him into a new shining star in the medical field. Along the way, he must face medical corruption, competition, and infighting from other doctors, and even find time for a love life as he strives for the top of the medical field!

Passing through the world after nuclear war on Earth, all humans fall into a game called “Transcendence”.Through games, people can gain the power to move mountains and seas. The strong can cross the void or the universe and do anything they want.Stel had been in this otherworldly place for eighteen years when one day, he woke up with the ability to “Evolve Every Day.”Various talents?Evolve!SSS-class “Descent of the God,” all attributes doubled, resurrection from death.SSS-class “Soul of Arcane,” all magic cast without conditions, power doubled, ignoring the opponent's defense.What about different skills?Evolve!“Fireball” → “Flamestorm”“Wind Blade” → “Storm of Death”...And what about different professions?Evolve!Treasured items? Evolve!Pets? Evolve!By the time Stel stepped out of the gaming pod and back into reality, the entire universe was already at his feet.