MTL - Why Did You Summon Me? - v2 Chapter 566 .Void counterattack

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.

The system asked: “What happened to the slag man?”
Bei Yu Tang answered: “Destroyed.”
The system asked again: “What happened to the boss?”
Bei Yu Tang immediately ran away!
Whether abuse of slag male or white lotus, she, Bei Yu Tang is very skilled.
But regarding abusing the boss, forget it!
Big BOSS’s fighting power is too strong, for small shrimp like her, it is still the best policy.
She did not want to destroy the boss, but was destroyed by the boss.
BOSS lord: “Wife, who do you want to destroy, let your husband do it.”
Bei Yu Tang excitedly replied: “System monarch.”
System: (face filled with tears and dead … …)
[Story of pampering, 1v1, Straightforward story, Easy and humorous]

- Description from 69shu translation

The notorious imperial court lackey and the meritorious military general were well-known for their mutual dislike, a pair of arch-enemies set in stone. Who could have foreseen the unexpected change in the winds of heaven: the general injured on the battlefield, both legs disabled, and even forced by the emperor to marry his nemesis.  

With one marriage edict, two people with mutual hostility are forced to marry and live under the same roof. Yet after these long days together, they come to the realization that this fellow is not truly devoid of any saving grace/unattainable and high out of reach.

- Description from Novelupdates