Asherah was a Goa'uld queen who plotted against Ba'al. In retaliation, Ba'al attacked Asherah's homeworld Kadesh with Death Gliders and troops. The city was reduced to ruins and Ba'al's troops killed and took refugees captive.
One of the lesser Goa'uld of Asherah's circle was actually a Tok'ra spy. (RPG: "Stargate Demo Characters: SG-17")