I Unlocked Beast Language and Became a Bigshot After My Rebirth! - Chapter 52 - : Clearing Misunderstandings

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.

“I like you, can you be my girlfriend?”“I am sorry, but I like girls, not boys!”The words of the campus belle immediately broke our boy’s heart.In sadness, he ended up playing a recently popular online game; but even their the 3D girl he liked was in a lesbian relationship with another NPC.But who would have guessed: A little accident made him wake up as a small-time villain character in this game he used to play?Feeling frustrated, he embraces his identity to avoid his tragic death.But Amar’s greatest enemy is the female protagonist who tries to make a big yuri harem with all the heroines.As a villain, can he steal her girls instead & achieve a perfect ending and uphold the dignity of our fellow men?

The legendary mana finally reached planet Earth, causing all living things to officially enter the path of evolution.

Life is unpredictable. Her husband loved her stepsister, deposed her as Empress and even forced her son to death. In that Cold Palace, she was forced to drink poisonous wine. So in the next lifetime, she made a promise to never do good deeds and help others, to never step into the palace and to never become the Empress!