The Swapped Master's Bride And Her Bad Luck System. - Chapter 70: Companionship--suddenly.

Liu Yan, an ordinary office worker from Earth, unexpectedly traveled to a strange world.

The heroes of the ages are on the side, embarking on a journey to conquer the heavens.

- Description from novelbuddy

In this captivating fantasy novel, Luo Mu has spent fifteen years in a mystical world, feeling disheartened by the belief that hard work yields little reward. Just as he begins to lose hope, a miraculous system activates in his life—the Heavenly Path Rewards Diligence System.With this newfound power, every effort he makes leads to astonishing gains, governed by a unique critical hit mechanic that can amplify his rewards by up to ten thousand times. As he diligently practices his cultivation techniques, immerses himself in ancient texts, and rigorously trains in powerful martial arts, he experiences unprecedented successes: gaining rewards that skyrocket from hundreds to thousands, and even ten thousand times his initial effort.Years later, as Luo Mu stands at the zenith of strength and ability, he becomes a figure of admiration and inquiry. When asked how to achieve such greatness, he simply smiles and states, “The Heavenly Path rewards diligence; it’s all about hard work.”This tale explores themes of perseverance, the value of effort, and the extraordinary possibilities that come from dedication and hard work in a richly woven fantasy world.

Klein’s greatest wish is to transmigrate to another world and live life in an isekai, just like in anime, manga and novels. However, fate is on his side and the typical truck that the main characters always carry in isekai runs over Klein. But, to his bad luck, he lived a few more days in the hospital and, just on the day he died, Klein heard a ⟨⟨-DING-⟩⟩ that he knew it meant. That was the day of his death, but also the beginning of his adventure into another world.

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.