From Halopedia, the Halo wiki
Admiral J. Garcia was a high-ranking officer in the UNSC Navy at the close of the Human-Covenant War. On October 8, 2552, Garcia forwarded Sequence Log 01-0089 to UNSC High Command. The 844 files comprising this sequence log detailed the preliminary reports of action during the defense of Reach. It documented UNSC fleet actions in the Reach Defense Coordination Zone during the period of time from July 24 to September 5, 2552. The findings from this time were forwarded for additional simulation and comprehensive data mining. The report also included morale and disciplinary reports from all major commands.