Reborn: Rise of the Greatest Summoner - Chapter 143 Sand Worm Competition

I gave them my everything.My time… my strength… my heart.I trained while they slept.I smiled when they laughed.I stayed… even when it hurt.And what did I get?Nothing.They looked at me like I was pathetic.Like, I didn’t belong.Like I was… less.But I... the naive person I am, continued trusting them.They told me to act like trash, fine—I became trash.They told me to act like a scumbag, fine—I played the role.However...One mistake, one single moment...That’s all it took.And they threw me away.But now…Someone else woke up in my body.A stranger, a man who doesn’t know the pain I suffered, but wears my face.Let’s see what he does with it.Because me?I’m done with this life, so to the soul who took over my body...This is your mess now…'Gray'.

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.

Everyone in the world had transmigrated to an alternate dimension overnight.Everyone here was a lord. They could choose their background and obtain a small yard and three farmers at the start.Lords needed to explore the maps and occupy territories to obtain resources, develop and expand, and conquer monster nests.They had to defend themselves against monster invasions and attacks from various factions to survive.Zong Shen awakened the strategy system at the start.There would be strategic information on everything he saw.The system helped him to find every hidden treasure.[The crooked tree 50 meters southeast of the territory is not as simple as it seems.][You will get a surprise if you walk 35 steps to the front and start digging.][Stop looking, this treasure chest is a trap. The poison gas within will knock you out for three days.]

‘I must entertain the masses.’ This was Jester’s lifelong goal.After leading 12 different lives as a Hero, King, Sage, Jester, and more, all he wanted was to mock the king and his court.Unfortunately for him, his majesty didn’t appreciate his vicious jokes.Jester died, trying to flee for his life. But death wasn’t the end for him.For his 13th and last life, he triggered the Archetype System and reincarnated in a world of magic and perils.[This is your last life. Don’t waste it!][Welcome to the world of Archetypes!]Oh, before I forget, soon, players from Earth would flood into his new world.But even players won't escape from his clutches! Even people from the Earth will be tamed!