The Real Rich Daughter is a Future Genius Scientist - Chapter 378 - : Undercover

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 2030 AD. The origin universe game “Divine Revelation” made its grand debut. In this game, the in-game currency could be exchanged for real money, which attracted countless players. Even countries were getting ready to enter the game. But no one knew that Li Yi who had fallen in the War of the Gods returned to this very day when the game was launched with ten years worth of memories from the game. And this time, Li Yi received the SSS Rank Talent – Blood Devour. [SSS Rank Talent, Blood Devour: After slaying any creature, the player would gain 1% fixed Health Point, and life regeneration speed. The effect of this talent can be stacked indefinitely] [Notification: You slew an LV1 Sika Deer, received 1 HP, 0.01 HP regeneration/second] [Notification: You slew an LV5 Elite Goblin, received 7 HP, 0.07 HP regeneration/second] [Notification: You slew an LV10 Legendary Boss – Aoi Flame Green Dragon, received…...] From them, an invincible being who had a health bar even longer than bosses were added to the game. “Report: Li Yi is cheating, the HP of the entire dungeon’s monsters added together is still less than his!” “Report: We attacked Li Yi with the joined force of a 1000 players army, but he only lost a slither of health!” “Report: Please tell me, how are we supposed to attack the city with Li YI standing in front of its gates?

Many years later, when the game started to fuse with reality, and the War of the Gods began, Li Yi stood at the front alone and faced the gods of the worlds. Only then did the players wake up, “Dear Sir, we’re begging you, please have even more HP!””

Pirate World, Before the Summit War.Sengoku: “In this war, the advantage is ours!”Vice Admiral Tsuru: “Can we really win?”Sengoku: “We will win.”As the Summit War begins, chaos erupts on the battlefield.Above Marineford.Suddenly, Will appears in the sky with his crew, overlooking the entire battlefield.Sengoku: “What exactly are you here for? Are you planning to help Whitebeard?”“Don’t misunderstand.”Will scans the battlefield, his gaze sweeping over the powerful figures present. A hint of excitement lingers in his tone.“I’m only here for one reason—to kill all of you. That’s it.”Sabaody Archipelago.Will watches the Celestial Dragons strutting arrogantly through the streets, their eyes filled with disdain for the world. He can’t help but frown.“These are no ordinary Celestial Dragons… This calls for a heavy punch!”...Without hesitation, he throws a devastating punch, obliterating a Celestial Dragon on the spot, crushing the surrounding Marines and CP agents with overwhelming force.The survivors turn to a trembling communications officer clutching a Den Den Mushi and scream in terror:“Hurry! Notify Marine Headquarters! Call for an Admiral!”

Wen Zhixing has transmigrated into the world of cultivation and has been unexpectedly abducted to the Wondrous Palace, where is full of infamous female cultivators. However, with his Immortality System, Wen Zhixing discovers that he could see their “Fortune Fragments” and take advantage of these Fragments by consuming his lifespan.[ Acquire the constitution: Revival of the Withered Tree.][Revival of the Withered Tree: Blazing Gold Quality. Can rejuvenate a withered body. Each time the body enters a withered state, it will undergo nirvana. After nine nirvanas, it will shed its mortal form.]...