The Systems Army Zeta consisted of 294,912 clone troopers and was commanded by a High Jedi General, a role filled at this level by a member of the Jedi High Council. This Systems Army was composed of two Sector Armies.
During the Clone Wars, Systems Armies Delta, Epsilon and Zeta were assigned to the northern quadrant of the galaxy. These three Systems Armies were divided into six Sector Armies: the Seventh Army, the Eighth Army, the Ninth Army, the Tenth Army, the Eleventh Army and the Twelfth Army.
- The Essential Guide to Warfare (First mentioned)