Star Guild: Episodes 1 - 3 (Star Guild Saga)
They have lived in orbit around planet Lumus for over 800 years. They live in peace, never having been visited by another race. For all they know, no one else exists but them.
They are thriving and there are millions of them. They are Human. Here, disease doesn't exist. Life is long and comfortable.
They have never experienced war, and because of this, they aren't prepared for what's coming.