From Halopedia, the Halo wiki
File:CHELAN_20200420 is part of Director Schaefer's "content series" in ONI Section Two's public awareness campaign regarding the UNSC's role in colonial security. Aimed at educating UEG citizens on the history, evolution, and application of the Spartan Program.
- This file is the in-universe name of the "ONI Archive – Changing Tides - Halo 2: Anniversary" video.
- The filename of "CHELAN 20200420", unlike those for the videos released for the launch Halo: Reach and Halo: Combat Evolved Anniversary on PC, does not correspond to the release date of Halo 2: Anniversary. The CHELAN part of the name refers to the Chelan app that requests permission when the player logs into Xbox Live through Steam, itself a reference to the Chelan and many place names throughout the U.S. state of Washington.