I Can Summon All the Gods - Chapter 58

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.

Link, who traveled to the world of pirates, brought Doraemon’s treasure bag.

Just happened to meet Luffy who went out to sea, and has not awakened the true fruit ability of [Renren Fruit Illusory Beast Species Sun King Form], and he is still the rubber fruit Luffy.

That being the case, then I will follow this future One Piece, even more Liberation Warrior Joey Boy, the future Sun King *ka! !

Let’s enjoy the magnificent style of this pirate world together! !

In the process of traveling, all kinds of props also showed a powerful effect from Link’s hands! !

Luffy, actually [rubber fruit] has another name, do you know?

Hawkeye, are you the strongest swordsman in the world? 【Famous Knife·Electric Pill】Learn about it! !

Kaido, do you have the strongest animal army? I have some good flavors of 【Momotaro Rice Balls】, you can try it!

Im, do you want to destroy the world? 【Earth Destruction Bomb】Do you want it for you..

- Description from novelbuddy

I gave them my everything.My time… my strength… my heart.I trained while they slept.I smiled when they laughed.I stayed… even when it hurt.And what did I get?Nothing.They looked at me like I was pathetic.Like, I didn’t belong.Like I was… less.But I... the naive person I am, continued trusting them.They told me to act like trash, fine—I became trash.They told me to act like a scumbag, fine—I played the role.However...One mistake, one single moment...That’s all it took.And they threw me away.But now…Someone else woke up in my body.A stranger, a man who doesn’t know the pain I suffered, but wears my face.Let’s see what he does with it.Because me?I’m done with this life, so to the soul who took over my body...This is your mess now…'Gray'.

The powerful have caused chaos for all that are lesser than them since the beginning of existence.This is the story about the truth that everyone knows but no one realizes.The story of a king who failed his duty, a dragon who lost what it held most dear, a beautiful girl who lost who she was and a fae that was once a queen.Cades Kirgun is an ehetrian child, one that longs to become an artificer.But his plans go awry as his whole world collapses and he needs to flee.How will he survive ?How will he overcome the challenges presented to him and overthrow those that have held the power for far too long ?This is the story of a king born from rags, a king that leads to people to fight for what they believe in, the crusader king.