Different buildings in Halo Wars create different kinds of troops or units. Each faction in the game builds different structures and units, but they fall into the same categories. Some buildings produce air units, others produce ground vehicles, troops, or other tools for battle.

• UNSC
  • - Firebase/Station/Fortress
  • - UNSC Reactor
  • - UNSC Air Pad:
  • - Vehicle Depot
  • - Field Armory
  • - UNSC Barracks
  • - UNSC Supply Pad
  • - Base Turret
• Covenant
  • - Outpost/Keep/Citadel
  • - Shield Generator
  • - Warehousesupplies more often.
  • - Heavy Plasma Turret
  • - Mega Turret
  • - Temple
  • - Summit
  • - Hall:
  • - Factory
  • - Anti-Vehicle Barrier
  • - Type-26 ASG (Shade)
  • - Deployable Lookout Tower
  • - Gravity Lift
• Flood
  • - Flood Barracks
  • - Flood Root
  • - Colony Form
  • - Proto-Gravemind
  • - Unnamed Organic Tower-Like Form
  • - Flood Nest
  • - Unnamed Organic structure
  • - Flood Launcher StationaryHalo Wiki: Halo Wars Unit
• The Forerunners have structures around levels that can help any faction