During setup, players are dealt 1 fewer blue tile. Before creating the galaxy, shuffle the reference cards for factions not being played and deal 1 to each player. In speaker order, each player places that faction's home system in the second ring, equidistant from players' home systems. Then, that player places 3 neutral infantry on that system's planets, split as evenly as possible. These systems are minor faction systems and do not count as home systems.
When a player controls each planet in a minor faction system, they take that factions alliance card from the deck or from the player that owned it previously.
Planets in minor faction systems gain all three planet traits (cultural, industrial, and hazardous).