Evil Emperor's Poisonous Consort: Divine Doctor Young Miss - Chapter 724 - Ye Yu Xi’s Flame Seal

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.

Reincarnated without memories, given a second chance as a chimera with a limited lifespan. Leon struggles through his strange new life. He attempts to improve his dungeon and evolve himself to live longer and become the strongest Dungeon Master—no. The Dungeon Overlord.Helped by his Dungeon System: the mysterious Ifrit, Zafira a Level 100 Succubus Queen, and his band of trustee goblins. Leon aims to overcome his limits, survive and reach the pinnacle of the world. Whether through trade, domination, or tricking the hero's beautiful party members into becoming his private mercenaries.Leon will face the weakest and strongest beings in the magical world of Umbra and surpass all!

“If Gao ○○ and Zhen Jingwen both confessed to you at the same time, who would you choose? Heheheh, it’s so hard to choose! Can I just have both?!”

“What do I do if my GF likes BL? Shit! What’re girls reading all that stuff for? They should get married and have kids while they’re still young.”

“How would you guys rate my sister? Let me see…She looks pretty good. Old rules, 10 if she’s up to f*ck, 0 if she’s not, hahaha.”

“Disgusting homosexuals spreading Aids, perverted fujoshis are cancer of society!”

Not only did college student Xia Chuan have stage II advanced straight male cancer, he even had severe homophobia, much less being able to stand the existence of fujoshis. But then, he suddenly met with the greatest crisis of his life—

After waking up, he actually grew an organ only a girl would have between his perineum!

Was this not a dream?

Impossible…

Xia Chuan couldn’t stop his brain from recalling an ancient post on Baidu:

What if you turned into a girl one day?

—First, show your brothers a good time!

De! Fi! Nite! Ly! Not!!!! Xia Chuan pulled up his pants with gritted teeth and swore to defend his virginity to the death.

- Description from Novelupdates

On the desolate barren planet of Rennes, an Asian teenager named Lin Yuan receives an admission notice for the Empire’s best military academy San Romia. So begins his life changing military school career.

Lin Yuan: Wow! This school’s really great! Everyone even has a separate bedroom! But…why does my next door roommate always knock on my door? And all day long he keeps bothering me, God! So annoying!

Lin Yuan: I’m a Beta, my biggest wish is to meet a nice Beta girl, get married, have children and live in peace! Wait a minute… Why does my body suddenly feel strange? Why does this medicine look like drugs to prevent Omega from entering estrus?

Trembling in his roommate’s arms Lin Yuan blushes and tries to push off his chest: “Wait…wait a minute…I’ve always thought of you as a friend. Don’t do this…..ah….”

At that moment, Lin yuan seems to feel that the universe has malicious plans for him. The world is collapsing, who will tell him why the script is so wrong?

- Description from Novelupdates