Reincarnated as an Imperial Prince
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!!! Donation link: https://ko-fi.com/sorryimjustdiamond PS. Cover not mine, I just found it on google. If you are the owner and want me to take it down, then you can reach me in the comment section.
Realization
It took Diana two minutes to calm herself down and composed herself after the emotional breakdown that possessed her to something that she wouldn't normally do.
Alexander found her action to be understandable. If the person who killed his parents is sitting across from him, he too would lose his rationality and begin attacking them in a way unimaginable.
Anne was an executive member of the Black Hand, which would make her an accomplice to the death of Alexander's parents. If not for his state of existence that he is not the real Alexander, there's no doubt, instead of stopping the fight, the real Alexander would be even glad to join Diana.