Wildfire
From The Stargate Omnipedia
Special directive initiated by a commanding officer at Stargate Command. During a "wildfire" the base is locked down, and no one is allowed in or out of the S.G.C.
KEY EPISODE
[https://www.gateworld.net/sg1/s2/message-in-a-bottle/ Message In a Bottle - General Hammond authorizes Code-Red-dash-Beta, initiating a wildfire when an alien force overruns Jack O'Neill and the gate room.