S-III

''This article is about the folder called S-III. Were you looking for Spartan-III program or ONI's Section-III''?

S-III was a folder on Colonel James Ackerson's computer at CASTLE Base on Reach. When Dr. Halsey hacked the computer, she discovered two folders, S-III and KING UNDER THE MOUNTAIN.

CPOMZ
Contained in the S-III folder was a file called "CPOMZ", which contained star charts. Halsey used the CPOMZ star chart to locate the SPARTAN-IIIs and the planet Onyx. The letters CPOMZ are also an acronym for: Chief Petty Officer Mendez, the man who trained the SPARTAN-IIs at a young age. This lead Halsey to believe that CPO Mendez was somehow mixed up with Ackerson.

Spartan-IIs
In the folder were also extensive records of the SPARTAN-II Program and its members. This indicated that Ackerson had knowledge of and an interest in the supposed top secret SPARTAN-II program.