Advent of the Archmage - Chapter 676

Because of a chain bracelet, Bai Min inadvertently crossed over thousand years to become Daxing dynasty’s Murong Feng.

She married the mischievous and unruly 4th Prince Sima Rui.

Won’t this marriage disappoint the owner of the soul and body?

From their uninterested beginning until they slowly getting to know each other and finally got together.

An accident made this marriage predestined by fate became an autumn dream.

Eventually Bai Min cannot resist the longing of the heart and also cannot avoid the calling of her lover in the dream. She abandoned everything to cross over a millennium once more.

This affectionate love without regret and willing to give up everything was met with continous twists and turns.

She made a pact with her lord to be fated for three lives. Across a millennium, was it possible not to disappoint this lifetime?

- Description from Novelupdates

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.

“There are no heroes. In life, the monsters win.”

...

In 2106, [Mayhem Online], a fully immersive VRMMO game, was released. Soon, it dominated the world's economy when people could exchange the in-game currency with real-life currency and vice versa.

In the year 2107, Flynn Grey, a 22-year-old college dropout with an ambiguous history, joined in the fray of billions of people that had already started playing [Mayhem]. Hoping to uncover the game's secret and earn a fortune, he spent months on adventures without fruitful results.

For better or worse, Shura, Flynn's in-game character, ends up in a great Wyvern's den, acquiring a hidden class and a monstrous race. Join him as he defeats his past and paves his way into becoming a true legend in both worlds.