Yaxkin

Yaxkin was a race of human from planet Yaxkin. The people were brought to the planet by Omeyocans to be free from Goa'uld. The people used the Crystal skull to visit Earth and do commerce. Until one day when the Aztecs came through crystal skull and took over the sake of the shipment and the capital Picari. So people could not use the crystal skull to get help other worlds. And then Coatlicue in her spaceship and brought with her a Stargate. The people did not know about warfare or how they fought, but they knew about the advanced biotechnology, weapons.

They unleashed a bioweapon that killed the enemy except Coatlicue and later mutated and killed locals. Those elders of the people left a message in inskrivit in a building about the incident and that the virus died out with them the last of the people. A long time later arrived SG-1 and Nicholas Ballard to the planet to investigate it and found it deserted and the city in ruins, but no sign of a struggle. After they learned of the incident.