America 1919 - Chapter 859 - 294, Alliance, Division

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.

Transmigrating into the novel, [The Emperor of Luck] Gu Xia received the despair villain system and became a small villain who is destined to be face slapped by the protagonist then eventually killed.

Having been through the plot thousands of times and being failed by the system every time, he finally snapped.

“System! What did I do wrong this time!?”

[Host, please calm down... There has been an error in the world that I have no control over. As an apology I can grant you extra rewards once you complete the plot!]

Gritting his teeth and having bloodshot red eyes Gu Xia finally had enough.

[I quit being the villain! Fuck the plot, fuck the heroine's, fuck the protagonist, fuck everyone, I just want to live my life without being face slapped! I QUIT!]

Unknowing to him all of the heroines could now hear his inner voice…

Traveling to a different world, a bizarre, mysterious and vast world unfolds in front of Zhao Ji. He wants to run hard in this vast world and live a free and easy life.

- Description from novelbuddy

A handsome man was hit and lost his memory for dangerous driving and saved by Lin Xiaomi. Since the day, the man just hung on in her house and refused to clear out. Also, from that day on, the only goal of Lin Xiaomi was to dislodge him!

The first person that Leng Yihuang saw after losing memory was Lin Xiaomi, who was a full-breasted beauty simple like an innocent child. She fascinated Leng Yihuang like a magnet. Since the day they met, his only thought was to f*ck her!

Of course, the winner is king, the loser needed to warm the bed… But after the night, the bastard just disappeared. Lin Xiaomi swore to God that she would hunt down that as*hole no matter where he was.

But when a bunch of guards with guns showed up and called Lin Xiaomi “Your Ladyship”, she was struck dumb with fear and astonishment. The man who walked out of a Rolls-Royce was just Leng Yihuang, who turned out to be the heir of a big shot…

- Description from Novelupdates