Hollywood Zenith - Chapter 1213 : Assault!-2

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.

Quenser and Heivia came back from their one week vacation. The next stage that awaits the two is the experimental battlefield ‘Madagascar’, a huge island on the east side of the African continent. Quenser and the others have been sent to destroy the second-generation object from the Faith Organization: Trinity Style. The worst tropical night ever begins now!

Heavy Object EX chapters are being released with each volume of the Heavy Object anime home releases (blu-ray / DVD) in Japan.

In the heart of Dirtwich City, the Ruan family’s monthly combat contests draw fighters from all around. Among them, Ruan Xiude, a striking young competitor, stumbles upon a hidden Void. This Void reveals to him a unique attribute panel, visible to him alone. It grants him the Divine Level Duplication System, marking him as its sole chosen wielder. Ruan, once a simple orphan, now emerges as a notable figure in the martial realm of Zenithia Continent. Despite his talents, he’s not seen as the top contender in the Ruan family.Armed with the ability to duplicate martial arts and magical skills, Ruan’s destiny and the world’s balance are poised for a dramatic shift.But what unforeseen consequences will Ruan’s new powers unleash?

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