MTL - The Rise of Space Technology - Chapter 261 , huge influence

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.

Reborn into a failing noble family, Liu Xingchang awakens in a weakened teenage body, surrounded by humiliation and betrayal. Once the revered Sword God of the Northern Polar Heaven Domain, he now faces ridicule from his former lover, Yu Qiuer, who has abandoned him for a rival, and scorn from the very man daring to tread on his legacy.Though his power has diminished to a mere third-grade cultivation, Liu’s indomitable spirit drives him to reclaim his path to supremacy. When he fatally strikes his foe amidst the disbelieving crowd, even the noble Princess Qingyuan is drawn to this fallen “”coward’s”” defiant strength.Can Liu Xingchang resurrect his family’s honor, ascend to the Divine Realm, and turn the tables on those who scorned him?

Upon awakening, the apocalypse's metaphysics master, Nan Li, found herself as the lost Sixth Miss of the Anyang Marquis ManorThinking it would be a story of abuse, she never expected all five of her brothers to dote on her one after another!Nan Li shouted, “Stop pampering me! In fact, I can do everything, from capturing ghosts, exterminating demons, divination, physiognomy, to healing and saving people. I'll lead the family to rise in power and wealth!”Accidentally saving the Ninth Prince, who held great power in the court, Nan Li found him renowned for his cold and unfeeling demeanor. However, he became utterly addicted to pampering her and refused to take other concubines.The scheming and malicious women were angry, shouting, “The prince lacks heirs, how can this be allowed?!”Nan Li pointed at the line of little ghost-catching disciples and said, “I'll cure your poor eyesight!”The Ninth Prince lifted her in his arms and said, “We have a bit of thin property that needs to be inherited, so we'll have a few more children.”Later on—Nan Li looked at the continuous immortal mountains and the room full of treasures, her mouth twitching, “I thought you had a throne to inherit, what's going on now?!”

Fifty years ago, Dragon City transmigrated to the Other World. Alone in the world, they lifted the banner of Earth’s civilization and fought against the terrifying forces of the Other World.