Official rule text
5 KEY CONCEPT: UNITS During a game of Twilight Imperium, each player’s units are represented by plastic figures. There are three types of units: ships, ground forces, and structures. Ships Ships represent spacefaring units. Players use these units to engage one another in space combat and expand their empires to new systems. Ground Forces Ground forces represent foot soldiers. Players use these units to invade planets or defend their own territories. Structures Structures represent military installations built by an empire to support its war effort. Reinforcements A player’s personal supply of unused units and unused command tokens is that player’s reinforcements. When producing units and gaining command tokens during the game, players will take those components from their reinforcements. Infantry Space Dock PDS KEY CONCEPT: SYSTEMS AND PLANETS The game board for Twilight Imperium is formed using modular system tiles. Each tile represents a single system in the galaxy, which may contain one or more planets or other celestial bodies. Placing Units on System Tiles When a unit is placed in a system, it is placed in one of two areas on the tile. Structures and ground forces are usually placed on planets, while ships are placed in space—the star-filled area surrounding the planets. Planets