Mei Gongqing - Chapter 216

What do you do when your brother dies because of some entitled assholes? You go undercover.My real name? Clare. But at school, I’m Clause—just another guy blending in. Disguised. Watching. Yes, a boy. No, it's not an all-boys school—I'm just deep undercover, hunting down the bastard responsible for my brother’s suicide. Nobody—and I mean nobody—messes with my precious brother and gets away with it. They better pray I never find them, because when I do? Death will be a mercy, and trust me—I don’t do mercy.And as for the egotistical Alpha and the narcissistic Vampire Prince? They can go fuck themselves. I don’t do mates, I don’t do claiming, and I sure as hell don’t do them.

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.

Nicholas Marjan—known as Niels—was once an Asian football-obsessed loner in the modern world. A master of FIFA Career Mode, addicted to tactical YouTube breakdowns, and endlessly chasing transfer window drama, he lived the beautiful game from behind a screen.Until the day he died.Reborn in the late 2000s in a small European country, Niels wakes up in the body of a once-promising young footballer whose career was tragically cut short by a brutal ACL injury. With no chance to play again, and haunted by the weight of lost potential, the only path forward is through coaching.Now an assistant at a struggling lower-league club, Niels carries two things no one else has:-Knowledge of football’s future-A mysterious cheat-like instinct for scouting raw, hidden talentAs he begins to make waves with his unique coaching style, Niels catches the attention of the football world. Offers from top-tier teams in the top five European leagues come rolling in. With a growing reputation, Niels sets out to transform not just one team's fate—but to leave his mark on the biggest stages in world football.

Going against the heavens, Tuoba Ye reincarnated. Body concealing Divine Root, hands holding Divine Talisman, possessing previous life’s experiences, from childhood, began cultivating the most difficult body refining method: Mythical Nine Transformations.

- Description from Novelupdates