I Have a Mansion in the Post-apocalyptic World - Chapter 1493 - The Lavish Island

A realm where humans battle monsters and the good die young. 4 weeks ago Will woke up in a new world filled with Monsters and Magic.Thrust into this new reality with nothing more than a class called “soldier” and a leveling system he’s never seen before, Will fights just to survive. When he stumbles across a dying stranger, a mysterious quest line activates. Now Will must head to the front lines where humanity wages war against a ruthless Goblin Horde. There he will join the standing Kadian Army and forge his name from the fires of legend. He’ll have to face Goblins, Hordes of the Undead, cultists, and demons from hell. And that’s just before breakfast. Iron Blooded is a gritty Progression Fantasy with focuses on battles, leveling up, and political intrigue. Perfect for those who like their fantasy with a side of LITRPG.

The first time she traveled abroad, she encountered the tragedy of a missing plane. When she woke up, she transformed from a sunny girl into a Young Madam!On the very first day after waking up, he tormented her for an entire night, and then he planned to steal her heart! How could there possibly be such good fortune in the world?She swore to escape from his grasp.“Young Master, the Young Madam has run away again...”“Damn it, launch a city-wide search within 24 hours!”He cornered her against the wall: “What exactly do you want?”“You're so disobedient. It seems I'll have to find a way to tie you to me forever...” He said mischievously, gently stroking her flat stomach.[The main text has been completed.]

Luo Yi, a high school dropout in his original world, was isekai’d into the world of the Witcher 3. Starting out as a weak boy named Roy in the village of Kaer, Lower Posada, he was determined to grow stronger, no matter what it took. The first step toward becoming a legend was to kill. And his first kill was… a rooster. ‘You gain 1 EXP.’ Of course, Roy had his own cheat system like all the other isekai protagonists. His first step to becoming a legend started now…

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.