This article is about the ODST who died in the Battle of Mombasa. For the ODST who fought in Heian, see O'Brien (Heian).
Battle of Mombasa
During the Battle for Earth, his squad was dispatched from the In Amber Clad to relieve Marine ground forces fighting the Covenant invaders from the Fleet of Sacred Consecration in New Mombasa, Kenya. Their D77-TC Pelican was shot down by a Type-47A Scarab walker operating in Old Mombasa. When the dropship made a hard landing outside of Hotel Zanzibar, O'Brien was killed instantly during the crash. His death was announced by Private Walpole.
List of appearances