MTL - Perfect Secret Love: The Bad New Wife is a Little Sweet - v2 Chapter 2434 Baby, you are calmer.

The blacksmith Anvil created weapons alone in a ruined world.

He came across a community, a hero universe, where there are heroes of every dimension.

All the heroes wanted his weapons,

All the monsters hated him,

All the world blessed his existence

however nobody prevented his death.

Decades later, a dimensional invasion started on earth.

Kang Shin-hyuk, a boy who can’t use mana inherited Anvil’s VIP ID and memories.

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.

Gu Changge, a noble lady from a wealthy family, is a well-known business legend in Yuncheng, going into business at 15, taking over as President of Gu Group at 18 and becoming Chairman of the family business at 30.
She is murdered by her husband Shao Tianze, just to give his mistress Gu Changle a healthy heart. But a premeditated car accident makes Gu Changge revive in a new guise and settle into an 18-year-old girl, Song Yunxuan.
The new face, young body and experienced soul become her weapons of revenge. In her struggle with the four big families in Yuncheng, can Gu Changge shrink back? Will she open her broken heart again? Can she always head off dangers in power struggles?
Let’s find out if Gu Changge can revenge herself and create glory again.

- Description from Novelupdates

When a Medical student awakens in an infant's body in the deadly Hidden Mist Village, he knows surviving will require more than just his memories of a past life. In a world where children are forced to kill each other and bloodline abilities mark their wielders for death, Ren must carefully balance hiding his true potential while gathering enough strength to change the village's dark future. As Kirigakure descends into an era of unprecedented brutality, this reincarnated soul will discover that the deadliest technique isn't found in forbidden scrolls - it's knowing exactly when to reveal your true power.Fair Warning:This is a slow-burn story - no overpowered MC from the startPower progression is realistic and earned through years of dedicated trainingContains graphic violence and deathStory builds gradually with careful character and plot developmentWhat to Expect:Detailed training arcs and power progressionClever manipulation of future events using foreknowledgeOriginal story arcs and character development[This novel is for readers who enjoy:Smart protagonists who rely on wit over raw powerRealistic skill progression and strategic combatDeep world-building and political intrigueA fresh perspective on the Naruto universe]