Eternally Regressing Knight - Chapter 482 - How to Face a Mage

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 kind-hearted boy Suzuki was supposed to use his cheat ability to be “unconditionally loved by the local race” and enjoy a peaceful slow life in another world… or so he thought.

However, due to a small mistake by a goddess, he was actually reincarnated into a bloody, end-of-the-century world where humans were being destroyed by demons, with slaughter and torture everywhere.

Suzuki was in a desperate situation!! …But for some reason, the demons who saw him seemed to be acting a little strange – what could this mean?

……………………………………………………………

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Framed by her so-called best friend and half-sister, Su Qianxun stumbled upon a strange man when she was making her escape. A strange man so handsome it looked as if his face was carved by the Gods, but with a heart as cold as stone. A wild and fiery night ensued, and ever since then, they embarked on a journey filled with passion, lust, conspiracy and treachery.