Spoiled By The President:My Wife Is A Little Sweet - Chapter 56

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.

Throughout heaven and earth, I alone am powerful

Liang Muqiu seriously doubted if he had read the astrology forecast when he went out today.

He borrowed a fire in the bar, but borrowed it from his ex-boyfriend.

It is said that old partners would never contact each other. However, they hadn’t seen each other for seven years, yet this bastard was not only not old, but also more handsome than before.

Especially when Cen Nan lit a cigarette for him in the dim light, his eyelashes drooped slightly, like when he kissed him under the blossoming tree seven years ago.

Liang Muqiu: Damn it, why was he still a little excited?

It took a long time for Liang Muqiu to wake up.

From the moment he saw Cen Nan, what he wanted to borrow was not fire, but a kiss of reunion after a long separation.

After seven years of separation, he still loved the same person.

Coincidentally, so did Cen Nan.

- Description from Novelupdates

Elijah is dying.Afflicted with terminal cancer, his days are limited. So, after deciding to spend his remaining time with family, he boards a plane and sets off for the Pacific Northwest to be with his sister. However, along the way, Earth is transformed by the touch of the World Tree, injecting it with magical Ethera and connecting it to a much larger universe via the System. More importantly for Elijah, though, it also causes his plane to crash, stranding him on a deserted island. But all is not lost, and through the System, he gains the Druid archetype that may be enough to allow him to survive a hostile environment filled with powerful monsters as well as more mundane threats like starvation and the elements. Meanwhile, his sister, Alyssa, must survive the collapse of civilization as she knows it while trying to keep her family safe. Follow them as they try to navigate an apocalyptic world full of game-like stats, classes, and threats aplenty.