Shinji Matou at Your Service - Chapter 1084: The Emperor’s Brotherhood

A poor orphan, who lost both parents, stumbles upon a mysterious space and embarks on the path of cultivating immortality. From then on, he cultivates spiritual herbs, refines immortal pills, opens a shop, practices military formations, and establishes an immortal kingdom…This story is about cultivating immortality and farming, with a focus on ordinary people, not horses.

Li Changlin, the underdog, was a small-time anchor who, by chance, acquired the Divine Tycoon Development System from Earth, and thus embarked on an awesome journey to become a life-achieving tycoon.

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 wealthy circle of the third district of the Federal Empire, everyone knows that Su Wan, the daughter of the Su family, has loved Huo Yichang for many years.

The two families are rightly matched, and they were childhood sweethearts, but they got married today, but the groom ran away!

Everyone was sympathetic or waiting to see the joke, but the bride Su Wan was very excited!

As long as this wedding is completed, she will not have to be forced to marry, and she will have an explanation to her grandfather.

As for the groom gone? Then change it!

Then Su Wan bumped into a man at the corner of the corridor.

The man was extremely handsome, with fluffy ears, a big fluffy tail, and a pair of big wet eyes, looking at Su Wan expectantly.

Su Wan immediately decided that it was him!

Pull people and run away, the mastermind registers for marriage, and goes through the wedding cutscene, all in one go!

When Su Wan thought that the bridal chamber could be skipped, it happened that this person exploded.

When she woke up, she found that the person she was crying and hugging her dear last night was actually the first commander of the empire?

Su Wan: Run away, run away!

But one month later, at the opening ceremony of the Imperial University, Su Wan looked at the specially invited Commander, who was specially invited on the podium, wearing a dark blue special military uniform, with an ascetic and cold face, and suddenly fell silent.

Gu Jue: I heard that someone took advantage of my distress and dragged me into marriage, and even comforted me?

Su Wan: I haven’t heard of it, it might be a rumor!

A smaller version of ‘Gu Jue’ jumped out next to him: Ma Ma, haven’t you heard of it?

Su Wan: …

- Description from novelbuddy