CEO's Sudden Proposal - Chapter 513

“O, Hero!” With that cliched line, Kazuya Souma found himself summoned to another world and his adventure–-did not begin. After he presents his plan to strengthen the country economically and militarily, the king cedes the throne to him and Souma finds himself saddled with ruling the nation! What’s more, he’s betrothed to the king’s daughter now…?! In order to get the country back on its feet, Souma calls the wise, the talented, and the gifted to his side. Five people gather before the newly crowned Souma. Just what are the many talents and abilities they possess…?! What path will his outlook as a realist take Souma and the people of his country down? A revolutionary transferred-to-another-world administrative fantasy series starts here!

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.

In modern society, a 24-year-old ordinary young man Reid managed to avoid a dump truck and declined the invitation to the reincarnation space, only to be sent to the Marvel Universe by a computer malfunction. There, he obtained the DC role-playing system. As a result, the Marvel Universe got a taste of the darkness from the DC Universe.In order to protect the Wayne Corporation, Alfred pulled the trigger on the executives supporting the IPO.To eliminate the mutant threat, he allowed Jean Grey to be infected with the Joker infection.Captain Marvel, who served as the cosmic police, could never have imagined that the Martian Manhunter, who followed her in fighting against the Kree empire, had been secretly controlling her mind all along.“I am indeed playing the role of a hero,” Reid did not deny this. “However, it's a hero that belongs to me.”When the threat was finally neutralized and the Justice League ascended the podium, people realized they had already been shrouded in injustice.

Bochang finds himself transported to another world, and upon opening his eyes, he encounters two Stellaron Hunters - Silver Wolf and Kafka.[Dating Options Activated.][Option 1: In this moment... there's no more time for hesitation. Shout at Kafka, “Mom!” - Completion Reward: Randomly obtain the power of one out of twelve talismans.][Option 2: Shouting is unrefined and may startle others. Instead, try gently saying, “Kafka?” - Completion Reward: Get beat up by Kafka.][Option 3: As someone who suddenly appeared, perhaps you should act normal by expressing confusion: “Who... are you?” - Completion Reward: Unlock the Abundance Fate Path and gain a random Imaginary ability.]Feeling powerless, Bochang internally protested, What kind of dating options are these? Seriously, there's not even a hint of romance involved!However, it wasn't until some time later that the black-haired youth realized the tragic reality, that these supposed “Dating Options” were actually “Troublesome Dating Options.”Watching as girls like Stelle, March 7th, and Himeko circled around him, Bochang thought, “I want to fall in love.”Dating Options replied, “No, you don't.”