Dragon Ball Legend of Ayaka - Chapter 7

It burned an entire kingdom to the ground for petty revenge against the humans.

It ransacked the Board of Sorcery, hoarding all the cores in their treasury to ease its greed.

It killed and destroyed a God for entering its territory without its permission.

In a cavern within the Great Aeternus Labyrinth, a reptile seemly like any other hatched from its egg.

With a growing intellect it shouldn’t have and adaptability traits that is impossible for its current tier of evolution, it began its life surviving and growing stronger.

Read as this reptile mutate and evolve. Watch as it change the world of Atinen, as it usher the world into a new age of chaos and destruction as well as prosperity and hope.

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.