The Protectors are able to set up an advance staging base near the Rimmon colony for use against the aliens.  They need the site cleansed before they can begin construction.
My advance scans show a significant enemy presence that you must eliminate.  I have no fear that you will overcome the insurmountable odds I am calculating against you in this mission.
You will be dropped to the Northeast of the future base.  Following insertion you will be required to destroy all alien units in the area.
Against my recommendations the Protectors feel that you will need support on this mission and are sending in a convoy carrying Statonex autocannons to assist you.
Surprisingly they are also sending in GUNNER to assist you.  I fear that the Protectors have little faith in you.  You should ask for more difficult missions in the future.
Regardless of your success in clearing the area of aliens the Protectors will be sending in a worker force four minutes after your arrival to construct the Headquarters.
Protect the workers until the Headquarters are complete.  There is no turning back after this mission is started.