This document presents the full ruleset for the wargame played at the Marine Corps? Information Warfighter Exercise (IWX)?an event designed to provide training for aspects of operations in the information environment (OIE). In the IWX wargame, two teams compete in a notional scenario, providing their side with a detailed plan for OIE and amending that plan dynamically in response to in-game events and the actions of the other team.