From Halopedia, the Halo wiki
In 2526, Zuma was matched against Hastati Squad in an exercise of capture the flag in the final exercise of the term. The squad split into three teams for the exercise, with two attempting to flank and ambush Hastati Squad and the third guarding the flag. However, the squad fell for a trap set by Thomas Lasky who ordered Hastati to place their helmets - housing the squad's IFF transponders - together in a clearing. The Zuma cadets discovered this too late, and were defeated in an ambush. Though Lasky fainted during the exercise, Zuma was defeated.
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