You are a Centurion candidate. Before you will be entrusted to lead any of Rome's legionnaires you need to be trained in tactics from small units to campaign size formations. Tacticum is designed to present different scenarios for you to work through versus an opponent, who could be another centurion candidate or one of the pesky trainers. —description from the publisher Main changes from Tacticum: additional 17x11 Invictus board for Advanced Training new formation: The Line new maneuver options: Rally on me!, Disperse new units: Cavalry, Skirmishers 19x19x9mm acrylic tiles 4 complete armies Terrain options: swamp, lakes, coast.