The Necromancer is amassing troops like crazy in the apocalypse - Chapter 519 - 428, The Untouched Armory

A 13-year-old deaf teenager living in the 21st century suddenly found himself as a young boy in Japan during the early 1900s. With two World Wars, two nuclear bombs, Hitler and many other disasters awaiting his future, he thought things couldn't get worse.Except it did.He found out later on that he had actually reincarnated into the world of Demon Slayer where man-eating demons ruled the night. He thought things couldn't get worse.Except it did.But hey! At least he had unparalleled talent, incredibly special eyes and future knowledge.How will the story of Demon Slayer change with the addition of this unique character? Will so many still die if the Hashiras had one more pillar in the final battle?Or will the story end on a much happier note?

I am a female secretary of an overbearing president in a typical dog blood drama text.

The kind of person who doesn’t have a name at the end of the day, and could only be called “secretary”, one who wears a tight fitting black dress and a pair of 10cm high heels every day, running around in front of the president, humbly praying for the president’s attention, and hating the heroine.

In fact, I really don’t. If I like the president, I’ll be struck by lightning.

I’m getting more and more sick of the president lately. Except for the outstanding appearance that the author forced on him, this person is really useless from head to toe, low in EQ, and low in IQ.

A legendary business genius who is all-powerful, but he doesn’t even understand anything, chickens know more than him.

I had to reject all of his unreasonable demands every day, and on the way, teach him relevant knowledge of economic law and finance, and gradually…he became a master.

I’m so tired, I really want to quit my job.

- Description from Novelupdates

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.