I Became a Mafia in the Academy - Chapter 12

The eldest son of the assassin aristocrat Tuatha Dé.

The skill, experience, knowledge of the previous life, magic, all of which grows his power as an assassin.

Excellent assassins pass through. He was usually admired as the ideal lord, and behind it wielded a blade as an assassin aristocrat.

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.

It was the year 2050. The world had released an online game, “Second World”, that shocked the public beta. Gold from the game could be exchanged for real-life currency, attracting countless players. Every country in the world fought for game resources. The main character immediately entered the game after this wave.

After entering the game as an adventurer (job before job change), he stepped into the first stage of his life. It was a stage that even a child could pass.

He thought that it was a normal stage. However, he did not expect to be locked into the game and continuously repeat the stage!

As time passed, the stage finally let him pass as per normal a thousand years later. He finally left the dungeon after clearing the stage. It was only now that he realized that this was only the second day of the game!

He realized that this was not a dream after he saw his attribute panel. What followed was a variety of system notifications!

“Reached MAX proficiency with the ax—Ax God!” “Reached MAX proficiency with the sword—Sword God!” “Reached MAX proficiency with the heavy shield—Shield God!” “Reached MAX proficiency with all weapons—Almighty Master!”

“As your proficiency as an adventurer has overloaded and you have not changed your job in a long time, you can now undergo a unique job change as we have detected your proficiency with weapons—Battle God!”

A deep crack appeared on the ground when he struck the level 1 wild monster with the small wooden sword in his hand!

On her wedding night, framed for infidelity and to be burnt alive?Chu Qianli laughed heartlessly, “I've already written the divorce letter for you, farewell.”Feng Yexuan seized her firmly, his cold and sinister voice cutting through the air, “Thinking of leaving? The only way out is over my dead body!”…The Divine Doctor unexpectedly transmigrated into the unlearned Princess of Prince Xuan, and Chu Qianli only wanted to live an easy life without any ambitions.But she inadvertently caught the attention of the obsessive and insane Prince Xuan and accidentally got spoiled to the heavens!One day.The officials approached with gloomy faces, “Prince, the Princess is causing chaos in the Golden Hall again, please reassert your authority!”Feng Yexuan knelt before his wife with a thud, presenting a “taming husband whip” with both hands, “Lili, I've ripped their mouths for you, can you be a little gentler?”