Fireteam Zulu

 was a United Nations Space Command Marine unit stationed aboard the that actively participated in the Battle of Installation 04. They are met by SPARTAN-117 about a third the way through the Assault on the Control Room.

The Pelican that is transporting Fire Team Zulu crashes after dropping them off under the bridge the Master Chief first hears from them on. Weapons that are brought in by Team Zulu include a Rocket Launcher, Sniper Rifle, and a Warthog. A Scorpion Tank is also present, but doesn't seen likely to have been brought by Team Zulu as a pelican can only lift a Scorpion or a Warthog due to weight limits.

Speculation
Fire Team Zulu and Fire Team Charlie may be in the same company, maybe even same platoon.

Related Links

 * Fire Team Charlie