A Spartan's galactic empire

A baby crashes on earth In the world of 300. After his spaceship malfunctions, his escape pod falls to the earth at breakneck speeds. after falling down to earth he crashes in Greece and gets stuck in the mountains. Leonidas sent on a search party by his half brother, cleomenes the first. Finds the small, garlon and decides to adopt the child, naming him Deimos. I might still use different works as inspiration but I will create all characters in the book myself and create the universe and world's independently too.) And if I use other lightnovels or other works as inspiration, I will put it underneath my chapters afterwards. also a few tags so you know if it is something for you no harem no smut a lot of gore and violence ( once the war arcs begin) sci-fi cunning protagonist ruthless when needed but is capable of showing empathy.