The Ba'al's takeover of Stargate Command was an event that took place in 2006 during the Goa'uld insurgency.
Prelude[]
Ba'al comes to Earth in an Al'kesh and is shot down by an F-16 near Cheyenne Mountain. SG-1 meet Ba'al at the crash site and he tells them that the clones are rebelling.[3]
Battle[]
Stargate Command starts to round up the clones to receive the information they believe Ba'al possesses, the location of Merlin's weapon. Several teams including SG-1 collected several Ba'al clones by fighting their way through Jaffa. Finally all the clones are gathered at the SGC but unknown to the SGC the Ba'als brainwashed Agent Malcolm Barrett into breaking procedure giving them the chance to escape and take over the SGC. The clones take control of Level 15, 16 and 17 and take Barrett and Lt. Colonel Samantha Carter hostage. Lt. Colonel Cameron Mitchell, Teal'c and Vala Mal Doran each lead a strike team to provide a distraction so Dr. Bill Lee and MSgt. Sylvester Siler can release Symbiote poison throughout the levels. Meanwhile, Ba'al forced Carter to download the entire database of Gate addresses form the SGC computer in the hopes of finding the planet with Merlin's weapon and not only destroy the Ori but the Ancients as well.[3]
Aftermath[]
After Vala's team is discovered, Lee is forced to release the poison early and the clones have time retreat back to one location and use their locator beacons to penatrate the SGC's jamming signal and beam to a Tel'tak in orbit.[3]