After seeing the tenacity of the Spartans, James Avery went to the UNSC Security Council and requested to create an elite operations unit. The council though denied his request with only one branch agreeing, ONI. ONI went to work secretly gathering members of Alpha Company before Prometheus to join Avery. After the operation, ONI pulled about six surviving members of Alpha were then placed in the Corps. ONI went to Avery and gave him full command of all the units given to the Alpha-Zulu Corps.