E2-BAG/1/7

E2-BAG/1/7 is a United Nations Space Command infantry unit

It is of unknown type or size, although it's presumed to be a Marine unit.

E2-BAG/1/7 was interviewed by Dr. Robert McLees on multiple UNSC and Covenant vehicles and firearms that will appear in Halo 3. Some of these interviews were posted on Bungie.net's front page.