- Main article: Battle of New Jerusalem
It was discovered by the Covenant in early September 2552 during the Human-Covenant war and was known to be defended by the 26th Marine Expeditionary Force, who suffered 'near annihilation' in the Battle of New Jerusalem. Following the battle, the UNSC forces retreated from the planet, leaving it to be glassed by the Covenant. The Rookie fought at New Jerusalem as part of the 26th Marine Expeditionary Force, before being transferred to Alpha-Nine.
- ↑ Tobias Buckell confirmed that the Rookie in Dirt is the same character as the one from Halo 3: ODST. Thus, the battle depicted in the story has to be the Battle of New Jerusalem, as it was the last battle in which the Rookie participated before the Battle of Earth.