Destruction of Halvo BayEdit
Around thirty days after Emergence Day, Sullivan was part of the effort to defend the city of Halvo Bay from a huge Locust assault. Sullivan fought off the Locust attack on the Halvo Bay Military Academy, but was killed by a coordinated Ticker attack in the courtyard. Sullivan's COG Tag was later recovered by Cdt. Sofia Hendrik of Kilo Squad.
- Gears of War: Judgment (First mentioned)