Worldwide Class Change: An Invincible Swordsman - Chapter 523 - 522, The Power of the Divine Domain_1

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.

Luo Yu traveled through the world of Douluo, met Gu Yuena, and after a million years of painstaking practice, he finally became a beast god. After a catastrophe, he became a human being, forged the first divine body of Douluo, and awakened the heaven-defying twin god-level martial souls.

Save Bibi Dong and help Zhu Zhuqing get rid of the scumbag.

Master wants to accept me as an apprentice? Sorry, you don’t deserve it.

Show off Tang San with one hand, blast the white tiger with one punch, cut Tang Hao with three swords…

A few years later, Luo Yu swept Douluo, and the king came to the Wuhun Palace, stepping on the abyss, pointing at the vastness of the sword.

In the vast God Realm, who is worthy of a battle…

- Description from novelbuddy

kingdom-building video game. Now the lord of a struggling FF-rank village, Rowan is tasked with an impossible mission: to transform his village into an unrivaled SSS-rank territory.Fortunately, Rowan wasn't left alone as his rewards reflected before his eyes.-SS-rank 100x Reward-SS-rank Copy-SS-rank Merge-SS-rank..-....Armed with these powerful skill, Rowan set out to build the greatest territory and become the unrivalled lord!

When I cleared the final chapter of a game that was a national failure, I became an unnamed side character in it.

A non-standard, unmeasurable, EX rank supporting character.