MTL - I’ve Led the Villain Astray, How Do I Fix It? - Chapter 381

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.

“Your Majesty, someone cursed the Imperial Concubine to be a demon star.”

“Cut his tongue and feed it to dogs.” A certain King said in a light and gentle manner.

“Your Majesty, someone’s hand accidentally bumped into the Imperial Concubine.”

“Chop his hand and feed it to wolves.” In an indifferent manner, a certain King said possessively.

“Your Majesty, someone said that the Imperial Concubine ran away.”

“Ran away?” A certain King’s sharp eyes narrowed, then said with a sneer: “It’s best if she doesn’t get caught by this King, otherwise this King will let her become aware of what ‘wanting to stop but can’t’ means**.

A modern era crossed over to become a wolf-girl. She originally believed that she could dance around with wolves, and in the end she truly did, but this ‘wolf’ was one of those wolves. He was a perverted wolf!!

- Description from Novelupdates

Traveling through the world of One Piece, Ron, who became Kuina’s fiancé, awakened the god-level theft system.

In order to become stronger and change the fate of Kuina’s death, and to survive in this dangerous era of great pirates, Ron started to steal Sauron’s top kendo talent.

And that’s just the beginning.

In order to become stronger, Ron embarked on a journey to steal the talents of the world’s strongest.

“Ding! Congratulations to the host for stealing Karp’s physical talent!”

“Ding! Congratulations to the host for stealing Nika’s talent!”

“Ding! Congratulations to the host for stealing Shanks’ domineering talent!”

“Ding! Congratulations to the host…”

- Description from novelbuddy