Help! I unknowingly enrolled myself into a supernatural Academy - Chapter 16: Adopted

Waifus, Mechs, Magic! Witness a mind-blowing ride of spell-slinging beauties, earth-shattering mech wars, and an arcane system so deep you’ll lose yourself in its brilliance! Empires crumble, celestials clash, and the birth of legends in the most explosive, heart-racing epic you'll ever read!Jack Squire, a professional debris collector in Earth's orbit, witnesses the unimaginable — the colossal magical sigil igniting the sky above his hometown, Germund. As communications fail and soon an apocalyptic light blasts skyward and splits the moon in half, horrifying chaos dawn.Determined to seek the truth, Jack must navigate a perilous descent into a war-torn planet, where arcane magic and advanced tech clash in a brutal conflict between two empires.Osten Empire with its arcane: Magic & Spells (Essence and Slot System)V.S.Dunkelheit Empire with their war armours: Armatus (Think mecha)In this gripping sci-fi and fantasy adventure, ~one of a kind! Jack's quest to uncover the truth behind the cataclysm and save what remains of his world leads him into the heart of a war that shall decide humanity’s fate.

The most successful businessman of his time, who started from being a homeless orphan, died indignantly because of being plotted against by his most trusted aid, his own brother.

Because of her beauty, Dr. Su is visited by dozens or even hundreds of patients every day for various ailments like hemorrhoids and toothaches.Unexpectedly, there comes an even more outrageous claim: “Doctor, I'm injured there!”Just as Su Mei Xi was about to get angry, she realized it was the man she had met two months ago.Back then, he had been composed, but today, he claimed responsibility and they immediately registered for marriage at the civil affairs bureau, walking out with two red certificates.Initially, she thought she merely found a giant tree to lean on for shelter. However, when her ex-boyfriend, stepbrother... continuously came to harass her, she discovered that this tree not only had exceptional strength, a deep background, and mysterious origins but could also cook, wash clothes, and make beds...And then, one day, a helicopter landed, and he descended from the rooftop. Only then did she realize he was actually a distinguished war god!

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.