Mythical Beasts: The Useless Lady Is a Genius! - Chapter 40

In the end-French era, after countless calamities, the era of cultivation is coming to an end. The last combination of air transportation and evolution has evolved into the treasure board, which was obtained by the last practitioner in the end-French era, which opened up a legend of wandering heavens.

- Description from Uukanshu

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.

Not to fall into the cycle of reincarnation within the vast world,The heart transmits the Dao among humans.Willing to wield a sword to end myriad calamities,Exchange ruthlessness for a world of emotions!

The female protagonist is reborn, and her gift is a system that's both deaf and mute!Want to be a jack of all trades? It can be done!But first!Sit down and do some moving...Your brain!Only then can you earn Knowledge Points! With 100 Knowledge Points, you can convert them into 1 ability point, which you can exchange for...Oh~you know what!Family must be taken care of, debts of gratitude from the past life must be repaid, and the childhood sweetheart accidentally missed in the last life awaits her rescue!The proud system said, “I'll just quietly watch your struggle!”Zhen Yu retorted, “Aren't you supposed to be both deaf and mute?”Onlookers from various dimensions on the Trading Platform: “Tsk! Such a pitiful girl!”