World’s Greatest Militia - Chapter 29

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 the year Jin Stratus was born, Humanity had long since conquered the stars, with their sights now set on a cosmos filled with unimaginable horrors.Yet in a universe that is but one bubble in an endless sea of realities, on a worthless blue planet beneath a crumbling city, a slum rat named Jin Stratus awakens to his destiny.When the “Door to the Myriad Worlds” descends, Jin steps through, armed with nothing but his unyielding will and his innate comprehension-defying talent—“Against-Heaven’s Understanding.”In the Great Universe of the Starry Sea, where ancient beings can erase galaxies with a sigh and traverse endless light-years in a single stride, Jin is nothing but dust. But with each battle, each world, and each bloody step, he transcends the world that seeks to oppress him, forging himself into a being unrivaled across all realms.[Your Understanding is Against-Heaven.]-You have comprehended the “Bone Marrow Blood Tempering Divine Technique.”-You have evolved “Fist of Falling Thunder” into the “Thunder World Creation Technique.”-You have witnessed the collapse and rebirth of worlds, grasping the “Cosmic Palm Domain.”-You have obtained the “Limitless Incarnation Method.”From the gutter alleys of the Lower Slums to the endless cosmos, Jin Stratus will ensure the world remembers his name—For throughout heaven and earth, he alone… can comprehend it all.And he alone will become the strongest.

An RPG gamer who played the realistic VRMMORPG ‘The Amber Sword’ for years, finds himself teleported to a parallel world that resembled the game greatly. He takes on the body of an NPC who was fated to die, and with the feelings of the dying NPC and his own heartrending events in the game, he sets out to change the fate of a kingdom that was doomed to tragedy.

- Description from novelupdates

After crossing into the story, he finds himself owning billions in assets, starting off with a stunningly alluring wife and seven exceptionally beautiful daughters.However, Xu Hao is in a panic.His identity is that of the villainous antagonist in the book, doomed to be killed by the rebellious protagonist, who will seize his wife and daughters.Fortunately, there are still two and a half years before the plot begins, giving Xu Hao time to plan ahead.Wait—he’s also activated the Emotion Harvesting System?School belles, CEOs, police beauties, mature women, lolis, queens, sisters…When the plot finally unfolds—The protagonist, a war god, returns to find his mother and sister already embracing Xu Hao.The divine doctor protagonist descends from the mountains, only to see his fiancée heavily pregnant.The reborn protagonist meets his first love and childhood sweetheart, each holding a baby in their arms.…This novel and its characters are purely fictional. Any resemblance to actual people or events is purely coincidental. Do not imitate.