It was commonly known that Galra were bad and needed to be caught or killed on sight. It was freely spoken about and taught on Planet Altea. Prince Lance was 13, when his world view changed. Everything he was taught was destroyed in a moment of fear. Some things are meant to be kept a secret and never meant to be shared. Although, they get shared or leaked either way. {disclaimer this is not my work.go check out Wish2free on Ao3}