A Company

The 405th Infantry Division is a Marine unit based out of Diego Garcia. "A" company, of an unknown Battalion and Regiment, arrived on scene during the Covenant attack of Mombasa, Kenya on Earth. The commanding Lieutenant of the unit was injured almost instantly and command of the unit was transferred to Sergeant Banks. They went on to fight on the city streets of New Mombasa valiantly.

The 405th assisted the Master Chief in the destruction of a Scarab that was moving through the city. Members of this unit then traveled to Installation 05 along with the Chief aboard the UNSC In Amber Clad.

Subordinate Units

 * 17th Marine Regiment
 * 77th Marine Regiment
 * "A" Company (Its Battalion is currently unknown)

Roster
Known members of this unit include:
 * Unnamed Marine Officer
 * Staff Sergeant Banks
 * Corporal Perez
 * Private McKenzie