The Nasyans are a peaceful race who welcomed SG-1 and were eager to aid the SGC in forming a research outpost on Nasya. The Tok'ra Jolinar had fled to Nasya and hid from the Ashrak by taking the host body of a Nasyan man, and it was probably the search for Jolinar which triggered a sudden Goa'uld attack after more than 300 years of peace. SG-1 was able to rescue 237 people from the devastation of the planet. They were evacuated to Earth and treated at the SGC and the Air Force Academy Hospital, awaiting relocation to a new homeworld.
Episode Reference: In the Line of Duty