This is the condition used to designate normal peacetime. (Nothing to see here, folks )
This refers to normal, increased intelligence and the heightening of monitoring the portal. May just be temporary - or could get worse.
This refers to an increase in negative portal activity. Communication between all Elite Guard members heightened.
This refers to an advanced increase in negative portal activity. All members need to be active to help monitor and protect the portal. Usually set when certain crews make concerted efforts at spamming the portal, or some have crossed the line with abusive material.
This refers to war. The portal is under attack from one or more major sources; wartime protocols are put into place, and direct lines of communications between officers is kept open. May need to use alternate forms of communication if the portal has been compromised.
It is up to the Barracks commander, SlashFirestorm, to set the current DEFCON level.