Reborn into a Hamster for 233 Days - Chapter 175 - Sense of Security

Survival is easy. Life is very difficult. My family wants not to live in humility, but to live a proud and glorious life. My family, will not be slaves!

- Description from Novelupdates

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.

In history, the most notorious Holy Knight! Corrupt Light! Holy Sinner! Blasphemer! The Irreverent! Wright has many well-known titles within the Church of the Holy Light.Angel: “The Goddess tells us to guard against fire, theft, and Wright!”Evil God: “Could you stop targeting me alone when you fleece us?”Evil Dragon: “He not only extorted my money but also abducted my precious daughter!”Devil: “Hell is still too kind and pure for Wright to handle!”Yet this man, whom the Goddess of Holy Light considers a thorn in her side, has become the world's most terrifyingly powerful Holy Knight!!Wright: “Do you believe in the light?”

Vincent Strider was a gun for hire who made a living by killing whoever it was his clients wanted dead. But during one mission, he died in a fierce gunfight. However, death was not the end for him. Vincent found himself reincarnated in another world, facing a floating interface that flickered before his eyes.[Synchronizing Host!][Military System initializing.]Vincent found out that in this system he received, he can summon soldiers, tanks, aircrafts, and even warships! This is going to be exhilarating.