The Big Landlord - Chapter 20.1

A man is reborn into the world of Avatar: The Last Air Bender as a waterbender from Katara's tribe. Best of all, he was the same age as her, and he had a system with him to help.He knows the future and a system that lets him continuously get stronger by completing quests or long-term missions, as well as giving him the ability to copy abilities from others for himself. He will become invincible in the world of Avatar, even more so than the Avatar himself.

Other people’s Alliance Heads are unrivaled in the lands, with an incomparable domineering air. With a shake of their arm they could cause a thousand waves to ripple throughout Jianghu.Tang Doudou practically wants to flip the table!Cook, warm the bed, warm the bed, cook… She’s completely been caught up in a goddamned cycle!After she finishes she still has to ask a phrase of husband-sama are you pleased?Uncle could endure but Auntie can’t endure!“Wife has worked hard. A moment in the spring night is worth a thousand pounds of gold, when we get home this husband will give you a massage!” This demonically charming black-bellied man’s phoenix eyes flashed as he smiled with a completely harmless expression.Tang Doudou looked to the sky speechless, …

I was the one who boosted your rank. Yet you stabbed me in the back? Fine. Goodbye. I’m taking it back. You’re finished now. Thanks to you, I now have an abundance of skill points for a prosperous hunter life. But… after spending some of those points, the S-Rank is starting to get obsessed with me…?

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.