After Entering the Wrong Room, I Became Mr. Feng's Wife - Chapter 57 - : Young Master Feng Took the Wrong Medicine

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.

Aurora Grey thought she could win her husband, Lucas Rossi's heart, even if it took years.For three long years, she endured his coldness, hoping that one day he would see her as more than just a convenient substitute.But when she reads the headlines announcing Lucas’s return to the city with his ex-girlfriend, Julia Mayhem, the truth hits her like a dagger—she never had a place in his heart.Lucas's affection had always belonged to Julia, and now that she’s back, Aurora knows her time is up.No longer willing to be the woman in the shadows, Aurora takes control of her fate. With a sharp resolve, she demands a divorce, choosing to reclaim her dignity rather than watch the man she loves cherish someone else.But Lucas Rossi isn’t a man who easily lets go of what he considers his. The moment Aurora steps out of his life, he realizes just how deeply she had entwined herself in his heart.Driven by a need to reclaim what he’s lost, Lucas tracks her down, determined to make her see that she belongs with him—and no one else.

Suzuki, an adult programmer, suddenly notices that he’s been thrown into a different world while wearing a casual clothes at level 1. He gained high levels and treasures after using the 3 times use-disposable-magic, Meteor Shower, once. After that he intends to do different world “sightseeing tours”? He meets 3 beast girls, beautiful purple and black haired sisters, and an eccentric blonde haired elf girl along with various people during his trip. Although there are occasional fighting with demons and demon lords, this is a heartwarming fantasy story at heart.

The messengers of destruction have once again been sent by their god, bearing the promise of apocalypse.Fire consumes everything, heralding the end of worlds— from Asgard to Atlantis, from heaven to hell. Once again, the fist of the god of destruction is poised to crush the very dimensions of existence, drawing ever closer to its goal. Amidst the chaos, a humble foot soldier—an insignificant speck on the grand stage—struggles to survive, fighting to climb towards the top.This is the combined story of Global Demon King: Starting as the Abyssal Dragon—Stronghold Legends and writer creativity