Mobile headquarters
Mobile weaponscommand
Weapons Command
Mobile stagingground
Troop Tarmac
Mobile vault
Storage Bunker
Mobile alliancebuilding
Alliance Building
Mobile alliancereserves
Alliance Reserves
Mobile warfactory
War Factory
Mobile weaponsagency
Research Agency

The Alliance Reserves Building enables you to request troops from your alliance members. These reserve units can be used as offensive or defensive units. If you are attacked the alliance reserve units help defend your base. If used as offensive units they will assist in the attack of an enemy base. However, if used as offensive units they will be eliminated and you will have to request new units.