2003

==Real World Events==
===April===
*April 1:
**The first episode of Red vs Blue was released.
** The novel Halo: The Flood was released.
===June===
*June 13: The official version of the Halo 2 E3 Demo was released on Bungie.net.halo.bungie.org: Hold on to your hats - the internet's coming down
===August===
*August: The tiltrotor squadron VMX-22 was established in the United States Marine Corps. A namesake of the unit would later be a part of the UNSC Marine Corps.
===September===
*September 29: The first edition of Halo: Combat Evolved: Sybex Official Strategies & Secrets was released.
*September 30: Halo: Combat Evolved for the PC was released.
===October===
*October 28: A special edition of the Halo: Original Soundtrack was released.
===December===
*December 2: The novel Halo: First Strike was released.
===Unknown Date===
*The first line of Halo action figures was produced by Joyride Studios.
==Sources==