Fog of War mode is a light game mode designed around using the Solo Faction cards to create a fast and furious style that trims down the supply phase to cut the game time nearly in half to focus the maneuver and combat phase, specifically on the victory capture points.  Much like the AI Solo mode players will follow an AI commander card's colored unit spawns, having random face down tokens of their faction that get revealed during the course of play.  Once a token is revealed players can substitute their miniatures (if they have that expansion) if they wish, or just focus on the gameplay.