Who let him join the Sword Sect?! - Chapter 237 - 208 Where is the Magical Valley

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 moment when mercenary leader Kwang Hwi receives video game like abilities, the world is suddenly thrown into chaos. A thick fog envelops the Earth, bringing with it savage, otherworldly monsters. At the same time humanity has been rendered defenseless against this onslaught, as the strange fog turns most weapons to rust. With mankind spiraling towards oblivion, it is up to Kwang Hwi, with his new abilities, to save the world. Watch as Kwang Hwi leads his militia and becomes the last bastion of humanity. Will he be this world’s savior, or its conqueror?

Rune was just an ordinary man from Earth — until fate threw him into Ninth Dawn, a world of swords and magic. Reborn in the frail body of a child cursed with an F-rank Divine Blessing, Rune’s new life was nothing but suffering.Branded with false accusations of rape and murder, he was captured by the Seraphic Order of the Black Veil (SBV). Brutally tortured and executed for crimes he never committed, his story should have ended there.But death wasn’t the end.Time rewound. Rune opened his eyes once again to the moment of his first reincarnation.This time, he vowed vengeance.Guided by Nexar, the Warlord’s System, Rune carved his path through blood and fire. He conquered territories, raised armies, and earned the fearsome title:The First Warlord of the Dawn.Yet even warlords fall. At the peak of his conquest, Rune was struck down by the hand of the Demon Lord — the true shadow looming over the world.And then… he returned once more.Back to the very beginning.But now, something had changed.The system reincarnated with him.Only, it wasn’t the same.Nexar had awakened anew as:Nexar, the Warlord’s Carnal System.With vengeance burning in his heart and a twisted new system at his side, Rune is ready to defy fate itself.War, blood, lust, and conquest — his dawn has only just begun.

Pressured to get married or lose her father's financial support to pay for her mother's medical bills, Joanna Baker, the illegitimate daughter of the Baker family, is devastated when her boyfriend chooses another woman over her on their wedding day.Joanna, feeling distraught, witnesses a man in a wheelchair proposing to his girlfriend at a restaurant. The girlfriend's rejection and subsequent insult for his disability left everyone stunned.Feeling a shared sense of betrayal, she approaches the man with a vengeful proposition.“Excuse me, sir. Your girlfriend dumped you, and my boyfriend chose another woman over me. Let's get married for six months and get revenge on them.”What will Joanna do when she finds out the man she proposed marriage to was none other than Alexander King, the heir of the wealthiest family in NYC? He was also the cold CEO of King Multinational, with a hidden identity, Salvatore Black, whose name caused even presidents shiver? Has she just signed a deal with the devil?