The Combat Phase consists of six steps:
Identify all Sectors containing opposing Ships.
Resolve battles by Sector Number in descending numerical order.
Ships attack opponent Population Cubes in their Sector.
Players may take Control of Uncontrolled Sectors where they have Ships.
Undefended Discovery Tiles are claimed.
All Ship damage is reset by returning Damage Cubes to the supply.
Inner Sectors are numbered 101–110, Middle Sectors 201–211, 214, 281; Outer Sectors 301–318, 381–382; Starting Sectors 221–232, Guardian Sectors 271–274; and the Galactic Center 001.