Subtitled "A One Brain Cell Diceless Divisional Level Napoleonic Battle System". "Based on the En Avant! diceless battalion level game, this takes the concept to the next level." "This system is designed to play out a corps battle using 6mm figures in about an hour or so. The intention is that there is a player per division, with a corps commander in overall control, per side." "It is not intended that the players see or use the game rules - this is to be done by one or more umpires." En Avant En Masse! is intended provide a rapid-play miniatures game that is accessible to non-wargamers yet still provides for successful results through the use of historical tactics. Gameplay is simplified by using labels next to each unit to show unit status and by having players use flashcards to issue orders.