Global Dungeon: My Support Is Too Strong - Chapter 691 - Great Escape

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.

In the vast Marvel universe, where superpower was still slowly growing in its infancy, several peerless superheroes tried to find their path in The Marvel Universe. A young adult named Ron from modern Earth unwittingly stumbles into such a world and begins his journey with an unknown power. This is a magnificent yet unknown true marvel world! This is the story of a normal young adult and his adventures!

- Description from Novelupdates

(Pirate + meme + invincible, the identity of the protagonist is navy + pirate + revolutionary army, mastering various elemental skills of fire, thunder and dark ice)

Yang Ming travels to the world of One Piece and gets the meme-making lottery system. /Anime/Classic lines of game characters, you can get a random ability/item, and even summon the character to appear!

“Work less and get more, and get something for nothing, that is my ideal!” “Congratulations to the host for speaking the classic lines under one person, and obtaining one of the eight miracles, Saint Thief!”

“Do you want to dance too?” “Congratulations to the host for speaking the classic lines of Naruto and getting Sharingan!”

“I want this day to never cover my eyes, and this place to never bury my heart!” “Congratulations to the host for getting the golden cudgel!”

It’s cool to make memes for a while, and it’s always fun to make memes all the time. As long as I make memes fast enough, no one can overtake me.

- Description from novelbuddy

200 years after the world has ended, the laws of society have long been forgotten.