From Halopedia, the Halo wiki
Fireteam Zulu was a United Nations Space Command Marine Fireteam unit stationed aboard the UNSC Pillar of Autumn that actively participated in the Battle of Installation 04 and operated out of Alpha Base. They encountered Master Chief Petty Officer John-117 during the Assault on the Control Room, when he stepped out onto a bridge spanning a large valley.
Battle of Installation 04
During the battle of Installation 04, Fireteam Zulu was one of the units that operated out of Alpha Base.
Assault on the Control Room
During the Assault on the Control Room, Fireteam Zulu was caught in a Covenant attack. The Pelican that transported Fireteam Zulu was attacked by Covenant Banshees on its descent to drop off the Fire Team. When they called for help John-117 with the Artificial intelligence Cortana was in the area and told them to hold their postition. After deploying the troops, along with a Warthog, the drop ship flew out of view into the next valley where it was later found crashed into the valley wall.
Fireteam Zulu then assisted John-117 as he fought his way through the valleys. When John-117 had to ascend the final main valley in order to cross a pair of bridges overlooking the valley, they did not follow because evac had become available.
List of appearances