Doomsday, Let's Open A Restaurant - Chapter 240: The Agreement with the Three-Headed Lion

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.

“201th, 202nd…”Zhou Can, an Intern of Tu Ya Hospital, a Grade A Provincial Tertiary Hospital, would silently count every stitch he finished.His target today was to complete 300 stitches and fight for a place in the House Officer recruitment two days later.[Congratulations on completing your 100,000th suture and triggering the EXP system. Medical skills and surgery practice can be obtained.]Zhou Can shook his head hard.What the hell is this?Something even more magical happened as he thought about it.An interface appeared in front of him.[Zhou Can, Intern.][Pathology Diagnosis, Level Two. Current EXP: 89.5/100. Outstanding House Officer-level diagnosis ability.]A surgical legend was in the making.

Dive into a novel about the rise of a legendary sportsman.
Follow Zachary Bemba on his journey to become the G.O.A.T (Greatest Of All Time) in the soccer world.

He travels back to a time in his past where opportunity abounds. Access to a system capable of propelling him to greater heights is just the icing on the cake.

From a nobody born in one of the poorest and most remote places on the planet, he relentlessly pursues his goal of becoming the greatest sportsman the world has ever seen.

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G.O.A.T SYSTEM INITIALIZING
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ACTIVATION SUCCESSFUL
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Eren Idril died as an old, decrepit, and piss-poor adventurer by the maws of a D-Rank monster. He had a lot of unfulfilled dreams and desires that couldn't see the light of the day after the light in his own eyes died down.

But fortunately for him and unfortunately for the world, that wasn't his end. Eren was somehow dived back in time when he was a mere teen, attending Lionheart Academy for adventurers.

When life gives him a second chance, Eren decides to exploit it to its fullest. Experience his vile deeds as he partakes in them without feeling the slightest bit of hesitation.