Mahouka Koukou no Rettousei - Chapter 14Volume 29 -

After obtaining the God of Cookery System, Jiang Feng started with a food stall selling rice combo sets and became the Culinary God of China!“The stall is a hidden gem. Seriously.”“I'll take one. I'm a food vlogger. I heard this rice combo set is amazing, so I'm here to review it.”“Didn't you just say it wasn't worth detouring for 15 minutes to come here?”Was there even a need to ask if it was tasty? Even a fellow vendor had become a customer!

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.

Lin Ping'an traversed to a High Martial World, where the Ten Thousand Races invaded, leaving the Human Race weak and on the brink of danger. At this critical moment, he awakened the Civilization Master System.He simply created countless speedy Demonic Cultivation Techniques that spread widely, causing the Ten Thousand Races to exclaim how truly bizarre they are.[ Painful Demon Body ]: The longer the cultivation time, the faster the Qi Blood grows, but the more painful it becomes.[ Qianyuan Burning Life Technique ]: Burns life to gain strength, living like a summer flower, blooming with momentary brilliance.[ Celestial Demon Dissolving Technique ]: Burn all of oneself to unleash the strongest combat power.[ Abi Dao Three Blades ]: Bound by Demon Thought, eternally falling into Abi, the three blades extinguish ghosts and gods.[ Heaven-Defying Seven Demon Slash ]: Soul destroyed with no regrets, protecting the Human Race, slash slash slash slash slash slash slash.[ Life-Burning God-Slaying Arrow ]: Soul as the guide, life as the arrow, one strike for the fall of the demon emperor.Emotionless Swordsmanship... Dao Heart Demon Planting Technique... Blood God Technique... Sunflower Manual... Blood Escape Technique... Soul Destruction Nine Palms...

Elliot Hawthorne, had transmigrated into the body of a struggling apprentice mage, and now had one simple goal, summon a small, harmless spirit to pass his magic academy’s final exam. But thanks to a mistranslation in an ancient grimoire, he instead summons Azrael, the almighty Demon King.That would’ve been bad enough…. but then the spell accidentally binds them in an unbreakable marriage contract.Now, Elliot is stuck with a possessive, dangerously powerful, and ridiculously affectionate demon husband who:Carries him everywhere because “His cute little summoner’s feet shouldn’t touch the ground.”Summons hellfire just to keep Elliot warm when he complains about the cold.Declares war on any kingdom that dares to call Elliot “single.”Refuses to be unsummoned.“Why would I leave? My husband is here.”Worse, every holy knight, exorcist, and jealous god now wants Elliot dead for “stealing” the most powerful demon in existence.. Stuck with a one-in-a-million system dungeon and a devilish Demon husband, Elliott's life is constantly on the brink of disaster...But when Elliot starts uncovering secrets about the contract, he realizes…Did I really summon him by accident? Or… was Azrael waiting for me all along?One way or another, Elliott’s unlucky life becomes worse. An impending doom threatens the existence of the human and mortal worlds.And as if that wasn’t enough, he’s also stuck with a Demon for a husband.But maybe, just maybe… being bound to a dangerously powerful Demon King isn’t the worst fate after all.