Isekai Nonbiri Nouka - Chapter 797

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.

(Marriage first, love later, short-lived parents, 1v1 double cleanliness)

Du Jingyi braved his fate and married into the Duke’s mansion, becoming the daughter-in-law of a wealthy family.

The husband is Shang Shaoyu, the most popular god of war in the Daxing Dynasty at that time, but it is widely said that he is known as a wife-suppressant.

I thought it was a match made in heaven.

Unexpectedly, on the night of the wedding, Shang Shaoyu only had time to lift his hijab, leaving a sentence of “Cezhou is in danger” and left in a hurry for three years.

After the master returned to court, he remembered that he had a lovely wife in his house.

I thought she had been wronged, but I found that my beloved wife hiding in Xitang Courtyard was living a better life than anyone else.

Everyone in the Duke’s mansion was going through so much trouble, but she was the only one who was pampered…

Du Jingyi just wanted a stable retirement, but he was forced to kill everyone in the back house.

First, half of the bed was given away, and then someone squeezed into my heart for no reason.

Just before her fall.

The general, who had a hard face and a cold heart, had a gentle and charming smile.

He whispered in her ear: Madam, please have mercy…

- Description from novelbuddy

In the world of Norse mythology, a human boy falls in love with Waltraute, the fourth Valkyrie sister. He wishes to marry her, but Waltraute gives him an impossible challenge to deter him.

Nevertheless, the boy is determined to carry out the dangerous task and to marry Waltraute afterwards.

Ercella lived a glorious life everyone envied, but died of an illness at a young age.

Before her death, she regretted not having become a proper mother to her son.

But somehow, she went back three years ago.

Ercella is living her second life.

I promise to be a loving mother this time.

However, is it too late?

“Now that you’re doing this, you’re just making me feel uncomfortable.”

The son only pushes her away and she realises that her relationship with the husband, who she thought was fine before her regression, wasn’t actually…