Already answered that back with the first questions you asked. There are no other sentient species in the Noctis galaxy outside of fanfiction. There could be some outside of the galaxy, but the distance traveled and all that would make it improbable, if not impossible that anyone would ever travel that distance. If it was a war, and a species traveled all that distance to wage it, they would still be there. If you come all the way to another galaxy with war ships, you don't spin around to leave after. If you come you are coming to stay.
|I KNOW that. I was reffering to the possibility that some OTHER race waged war on the Felisians.|