The military command has selected an enemy reconnaissance outpost as the target of their next attack.  They are in the process of assembling an assault force to assist in its destruction.
The humans have erected a defensive installation to be used as a launch point for the units that will be assaulting the Alien outpost.  
Our allies believe that the enemy is aware of their presence near their reconnaissance post and may try a preemptive strike. Defend the base until the planetary forces are scrambled.
For this mission you will be dropped within the defensive perimeter of our base and should move quickly to patrol for enemy units.
All buildings in the base must survive the Alien assault.  After you repel the enemy attack force the military command will deploy a force of fighters and shuttles from a nearby airbase.
Once the air support arrives you will have sufficient support fire power for the attack and you should quickly move against the enemy recon outpost.
The enemy outpost is located on a plateau which is treacherous to travel by ground but easily accessible by the air. Your role is to destroy the enemy defences before the human fighters arrive.  
Once the attack is initiated by the aerial forces you will be safe to destroy the enemy outpost.
