Toaru Majutsu no Index: New Testament - Volume 13, Chapter 3: Beyond the Broken Spider Web — Nightmare_to_Ray_of_Hope.

Archmage Kaplan possessed the body of a boy who was betrayed by his childhood friend.

In the boy’s diary, he found by chance that he wanted to become a great magician.

“Shall we try one more time, then?”

‘Let’s do it.’

In the end, those who are good at magic should use it well.

……………………………………………………………

Dear readers! Without any ads, maybe you will prefer .

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.

After three years of hidden marriage, he handed her the divorce papers because his first love had returned and he wanted to give that woman legitimacy to their relationship.She endured the sadness in her heart and signed.On the day he registered his marriage with his white moonlight, she had a car accident, and lost the twins in her womb.From then on, she changed all her contact information and completely left his world.Later it was heard that he left his newlywed wife and searched for her all over the world.On the day they reunited, he blocked her path and begged, “Sweetie, give me a chance, please.”

In this world, people are granted a power said to come from the heavens, a mighty weapon tied to the soul of humans. Those who receive these magical weapons fight against monsters to survive, driving the economy of this world.Lian is just an ordinary boy until his world is turned upside down when another race takes away what matters most to him: his family. From that moment, follow Lian's journey as he seeks the strength to avenge those who killed his family and uncovers the truth behind his power.