One Piece: The Strongest Trait System - Chapter 120: [] : Ability Exposed! The Most Vicious, Most Dangerous Man!

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.

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.

Ten years after her parents’ divorce, the grandmother who raised Chu Tingwu passed away, leaving her to be shuttled back and forth between relatives.At this moment, an entity claiming to be a “Cub Rearing System” suddenly appeared, wanting to bind itself to her and cultivate her into an outstanding graduate of its program.Just as Chu Tingwu was about to refuse, she saw her personal attributes on the system interface—[Name: Chu Tingwu][Species: Cat]Chu Tingwu: Something’s not right here…Due to a bug, the system had identified her as a kitten.Her stats were those of a cat, but her appearance remained human.How should an exemplary human-cat be raised? Sleeping, causing mischief, eating until she became as round as a pig?However, the reality turned out to be quite different: extreme sports, expert bird-catcher, master mouse-hunter, catching invasive fish barehanded with dynamic vision, using camouflage and tracking skills to film documentaries of rare birds, nearly making the social news as a suspected retired special police officer.For the first lesson in cultivation, the system said gravely:“A cub cannot live alone. We need to find you a cat mother… I’ve already detected a suitable candidate nearby. Go to the target location quickly, little one, and let the cat mother adopt you.”Chu Tingwu looked up as an advertisement fluttered into her hand:[Sunshine Pet Hospital: Limited-time half-price pet neutering, one month of free food with every pet adoption]Chu Tingwu: Who exactly is adopting whom here?

Yukima Azuma—charismatic, confident, and utterly unforgettable. He was the man every girl wanted but could never truly keep. One by one, they fell for him, only to be left with memories they couldn’t erase.Kasumigaoka Utaha: “I was his first, the one who taught him love… only for him to use it on other women.”Sawamura Eriri: “If I hadn’t been such a tsundere, maybe things would have been different.”Yukinoshita Yukino: “He was my light in the darkness, the only one who ever truly saw me.”Yukinoshita Haruno: “That bastard ran away after taking everything from me.”Hoshino Ai: “My only true love. The one I can never replace.”And when asked about their relationship with him?“Ex-girlfriend.”But to the women still in his life?Sora Ginko, Kato Megumi, Sagiri, Bocchi, Shinomiya Kaguya, Kirisu Mafuyu, Suou Yuki, Alya—“Thieving cats.”Because no matter how much time passed, no matter how far he went—one truth remained: Yukima Azuma was the one man they could never forget.