Star Odyssey - Chapter 3664: Take Care

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.

Chen Yan travels between worlds, ending up becoming an honorable prince in a medieval fantasy world. Yet this world was not quite as simple as he thought. Witches with magical powers abound, and fearsome wars between churches and kingdoms rage throughout the land.

Roland, a prince regarded as hopeless by his own father and assigned to the worst fief, spends his time developing a poor and backward town into a strong and modern city, while fighting against his siblings for the throne and absolute control over the kingdom. Join Roland as he befriends and allies with witches and, through fighting and even farming, pushes back invaders coming from the realm of evil.

- Description from Novelupdates

In the foreign world, the martial artists dominate the world and the sword of the emperor controls the fate of hundreds of millions of lives! Long Yu, the number one killer on Earth, after dying, takes rebirth in this new world in an aristocratic family of martial artists but faces rejection because he is unable to practice martial arts.

- Description from Novelupdates

An Nuan thought that she was going to have her happy ending, marrying the love of her life when the man left her on their wedding day.“Pei Zhi Yi, the moment you step into the elevator, it's over between us.”An Nuan thought that she could stop her fiance from leaving, but that man still left for the other woman.The wedding hall was prepared and the guests had all arrived. With no groom beside her, An Nuan decided that she would marry anyone willing.“An Nuan, if you are willing, then how about considering me as your groom?”Unexpectedly, the young master of the Lin family, Lin Xiao Feng stepped forward to offer himself.An Nuan did not expect much from this marriage, especially when they both agreed that they were seeking to gain something through this marriage.Lin Xiao Feng needed someone as his wife in his political career. Meanwhile, she just needed to marry someone to get over Pei Zhi Yi. As someone who was disappointed by love, An Nuan no longer wanted to believe in love.She never thought that the marriage that she did not expect would turn out better than she had expected. Young Master Lin would pamper her and support her whenever she needed help.Wasn’t their marriage just for show?