Abyssal Sovereign: The Demon's Dominion - Chapter 187 - 186: the federation shock, a new power is born

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.

“You never loved me anyway, did you?”---------------From the start, Lucy Grey knew her marriage was doomed to fall.She held onto her one-sided love for her husband for two years, but that was not enough to save their marriage.On the day Lucy was diagnosed with ovarian cancer, Landon stayed beside his first love at the hospital.Finally, she realized it was time to let go.On that same night, she signed the divorce agreement and left quietly.But fate dealt a cruel hand as Lucy found out she was pregnant!After three years of searching, Landon finally found her.However, when he stood in front of her doorstep, he never expected a child who looked exactly like him would adorably look up and ask, “Are you my daddy?”

They say the greatest blessing is marrying the idol you always dreamed of.

But Qiao Lian knows that reality is different…

The Internet claims that Best Actor Shen Liangchuan is a male god who is unaffected by any sexual drive, but Qiao Lian vehemently disagrees. It’s a lie!

After finally carrying out the contract, Qiao Lian burst out, “I want a divorce! I don’t want such a life!”

- Description from Novelupdates

Hye lived his entire life without a class. After the apocalypse hit the human world, strange creatures invaded and killed humans while new lands were being added.

Systems were given to humans and with the help of the guides, humans started to fight back for their lives. All of this happened under the watch of the venerable beings who were shining stars in the sky; gods!

Hye dreamt his entire life of a chance to prove himself. He was a hard working, earnestly learning and smart youth. However, the apocalypse never was merciful to such humans at all.

Until one day he got a chance to go back in time, when everything started. At this new starting point, he found himself able to finally obtain what he wanted, a class for himself and power beyond imagination.

But will things be this easy for him?