E2-BAG/1/7, or First Battalion, Seventh Regiment from Eridanus II, is a UNSC Marine Corps unit.

After Eridanus II had fallen in 2530, the unit was apparently reassigned to defend other human colonies. Following the Battle of Reach in 2552, they were reassigned to Earth. During the Battle of Earth, they fought in battles such as the Battle of Mombasa.[1][2]

Subordinate unitsEdit

  • Kilo Company
    • First Platoon
      • Third Squad

Known personnelEdit


  • E2-BAG/1/7 was interviewed by Dr. Robert McLees on multiple UNSC and Covenant vehicles and firearms that appear in Halo 3. Some of these interviews were posted on's front page.
  • They are known as one of the "ghost battalions" of Eridanus II because they retained the planetary designation "E2" despite the fact that Eridanus II had been glassed in 2530.


  1. Halo: Evolutions - Essential Tales of the Halo Universe, Palace Hotel, pages 349 and 366
  2.'s preview of the Spike Grenade