The President is Being Shameless Again - Chapter 294: Zheng Yuntong. I Like You, And I Want You To Be My Girlfriend.

Mu Zhiyan, after being transmigrated a millennium (1000 yrs) into the future, discovered that he was raised by his adoptive parents as a tool for them to access the heritage his (dead) biological parents left behind. When he was at a loss for what to do next, he discovered that his body hosted an additional
pharmaceutical system.

For a chance to return to his era of Earth, Mu Zhiyan decided to practice and practice; he must train the system to full level as soon as possible.

However, reality gave him a slap in the face. The world is dangerous and dreadful, making Mu Zhiyan recall his mother’s words of holding a thick thigh, resulting in him locking his eyes on a cool general…

So the rumored mysterious Mu Master faced General Han with a serious face: “I allow you to follow me, General Han.”

General Han: “…”

- 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.

Throughout heaven and earth, I alone am powerful

“Your Majesty, the pirates are coming!” said a soldier in panic.

“Don’t worry, let the ninja assassinate the tactical troops to solve them.” Pulkit smiled.

“Your Majesty, the naval fleet came over, the leader is the three Admirals!” Another soldier panicked.

“Three Admirals? Let the Kenpachi Zaraki team handle that.” Pulkit smiled.

“Your Majesty, the Four Emperors came to attack!” Another soldier panicked.

“Don’t mess, go and call the dragon!” Pulkit smiled.

“Your Majesty, the revolutionary army united with the world government and the world’s pirates all over!”

Another soldier was alarmed. Pulkit wears the Pluto God clothes, pick up the sword around, his eyes turned into Rinnegan, stood up and sneered, “just right, today they will be wiped out.”

- Description from Novelupdates