Marvel With Zanpakutou - Chapter 714: Broken Armor

I dedicated 10 years of my life, focusing solely on regression.[Authority: Death Regression has naturally been nullified.

[Quan You Fan: You can read without barriers even if you haven’t read the original book or TV series]

after many years,

When the legendary lord, the dragon knight, the son of the holy flame, the nightmare of the schemer, the smasher of the order of the game, the undefeated myth on the battlefield, the ruler of the seven kingdoms and the guardian of the whole territory——

When Samwell Caesar sat on the Iron Throne,

He must have thought of that distant afternoon when he got the pioneering order from the Rose of Highgarden.

At that time, no one could have imagined that this young man abandoned by his father would set off an iron-blooded storm that would sweep across the entire continent of Westeros.

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.

Luke never thought his obsession with novels would lead to his death — let alone reincarnation.After a fatal accident, he awakens in the world of Voidstar Chronicles, a novel he’d just finished reading.But there’s a catch: he’s not the hero. He’s Cassian von Luminaire, the doomed crown prince who dies before the story truly begins.Armed with the knowledge of the future, Cassian was determined to change himself and escape the terrifying fate that awaited him.But the world he’s in isn’t exactly the same as the book he read. Hidden truths and unexpected challenges blur the lines between fiction and reality.Can he outsmart fate and forge a new path, or is he destined to remain an expendable extra?—[Ding! Star System awakened successfully…]