Gray Team

Gray Team is the designation for a mysterious team of three SPARTAN-IIs of the UNSC Naval Special Warfare Group.

Background
Gray Team is the team that are noted to be "on battlefields too distant to be easily recalled" when the SPARTANS received the new MJOLNIR Mark V armor. The team was later identified to have been "on a mission far outside the confines of UNSC space, now missing for over a year".

Trivia
The Spartans' mission, location, and ultimate fate will be detailed in the new Halo novel, Halo: The Cole Protocol, which will be written by Tobias S. Buckell, author of "Crystal Rain" and "Ragamuffin". This was announced in an update on Bungie.net.