The Empress's No.1 Lackey - Chapter 522 - 398, Zhao Douan: East and West Buddhism, absurdly argue over Buddhist Law? Utterly ridiculous.

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.

Promise transmigrated to the TYPE-MOON world and became one of the students of Waver Velvet at the Clock Tower.But a dream must eventually come to an end.Upon waking from a night's sleep, he recalled his identity as a transmigrator and also discovered his golden finger.A Heroic Spirit Class Card.It can take Promise to different eras, and by leaving behind corresponding legends, he can ultimately ascend to the Throne of Heroes!He thus travelled to ancient Greek mythology and Norse mythology.Promise: “I heard after death, you can ascend to the Throne of Heroes. What are you waiting for, come on, kill me!”(PS: This book is not a traditional simulator story; its content mainly revolves around the Age of Gods, hence the Age of Gods is a long narrative!I didn't use TYPE-MOON in the title as it was already too large)

In the Canglan Continent, there existed a rule: only those who managed to awaken a Martial Spirit were able to pursue the path of cultivation, and a Martial Spirit’s rank was determined when it was awakened. Born in Linshui City, Qin Nan was a peerless genius who possessed great talents and was highly anticipated to become a great cultivator in the future. However, things changed when he ended up awakening the lowest-grade Martial Spirit, resulting in him being considered trash.

Chen Chao dreamt of becoming a powerful immortal cultivator, flying on his sword and vanquishing enemies with daoist magic. His hopes were dashed when he discovered that he had absolutely no talent for immortal cultivation.

Refusing to submit to his fate, Chen Chao joined the ranks of countless other talentless martial artists and embarked on the path of martial cultivation, a path scorned by the immortal cultivators.

In this era of strife where martial cultivators, immortal cultivators, and demonic cultivators wrestled for hegemony, Chen Chao will either rise to the top or fall into eternal damnation.