Reincarnated Into A Dead Woman's Body In Another World - Chapter 45: Arc 2, - 23: An Avenue

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.

After Chuzheng is suddenly pronounced dead by a system all of a sudden, her only worry in life becomes—spending money. Ever since she gets stuck with this system, her back is no longer sore and her legs no longer ache. Heck, there isn’t even a time when she goes out of breath.System: Let us set a small goal first and squander a hundred million… Little Miss, stop right there! Don’t activate the invincible mode!(▼皿▼#) Chuzheng: Can you please explain what is this thing that is leeching off me?Random Thing: Babe, you can do whatever you want to me.Chuzheng: (touches her blade) In-In that case, I will not stand on ceremony.System: Little Miss, please put the saber down right this instant! (▼へ▼メ)#LittleMissAlwaysDoesAsShePleases.

I have experienced all the eight sufferings of this world.

I do not ask for nirvana, but for you.

Wild and hard-to-tame demon (gong) x cold, ascetic and childish immortal (shou)

- Description from Novelupdates

Qin Shiwu grew up listening to his parents’ love stories from an early age.

He learned that his mother was known as a beautiful, gentle and virtuous Omega at school.

He learned that his father was known as a talented and courteous scholar Alpha.

Rumor has it that when they were in high school, they fell in love at first sight, became a harmonious couple and never had a single quarrel.

Once he transmigrated, he went sixteen years back to the time when his parents were still in high school and became a little fool who was bullied by everyone.

Who will tell him——

This person who grabbed him by the neck and shoved him to the ground! The super as*hole school bully who can’t get 100 points in all nine subjects is his father?!

That cold, unfeeling, kaolin flower, iceberg person, the most alpha Alpha in the whole school whom no one dares approach within a 500-mile radius is his mother???

Wait, mom! Were you so wild when you were young? You’re pretending to be an alpha!

Wait, Dad!! That’s your wife!! Is it really okay for you to fight with him now!!

- Description from Novelupdates