I Studied Abroad in the Modern Times - Chapter 110Book 2: : Everyone’s a Good Person!

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.

The servant looked at the grieving princess. “Your Highness, the Regent Prince sent your scholar fiancé to the Western Butcher’s daughter!” 

The princess gritted her teeth, speaking to her servant that it matters not as she has other suitors in line. Many days later, much to her dismay, the servant ran in a hurry. “Your Highness, the Regent Prince expressed his intention of becoming your suitor! All other men in line were sold to Gou Lan Red District!”

The princess was distressed. She said to her servant it matters not. She’ll soon be married to Prince Fuma. Then the uneventful came. The servant once more ran to her, almost tripping in the process. “Your Highness, Prince Fuma was imprisoned at home! Meanwhile, there’s a red sedan chair waiting at your residence for your marriage! It was led by the Regent Prince!

The princess was stunned. For a day such as this to come, it seemed impossible. This nothing but a sad story of a female boss crossing back in time to hold the thick thighs of the big boss. But while raising him, she was eaten in the process.

- Description from Novelupdates

After losing his job, Bai Liu became involved with an unstoppable horror live streaming game full of various monsters and players with killer intent.

Initially, everyone thought Bai Liu was just an ordinary person who strayed into the game.

Later, they realized it was this game that welcomed its god with victory and a laurel crown. It said to Bai Liu, “Welcome home.”

How wise is it to make an enemy of the divine. In the end, there a fine line between the divine and human...and to cross it is the biggest taboo a living thing can commit.But this was one Tabbo he was willing to cross._________Kyle Armstrong was a man who could do anything...in his past life. He climbed up to the pinnacle of power using his sheer determination and ruthlessness. However, because of God's who did not want the likes of him around, he failed.Everything was supposed to be over for him...until he got a second chance at life. However, there was a catch-he was throne in a new world that was similar, yet different to his previous one.Here, he must occupy the body of a Useless noble master and regain all he has lost....while also battling all the people who want him out of the way to claim his inheritance.The battle to glory and godhood is not an easy one, and the road is filled with lood. But Kyle has already overcome all this once. A second time will pose to not be a problem for him.______r18 is mainly gore...and MC's tendencies. You have been warned.