Probability Model Zeta[1] was a probability model of global distribution of armed forces used by the Forerunners. It was also used to predict the number of groups of Forerunners on a planet after the Flood had gained control of most of the system. The only known time global distribution of combatants ever conformed to this model was at the Battle of LP 656-38 e.


  1. Halo 3 - Terminal 1