The second part of the three stage Murrain Operation requires you to destroy a small supply depot that lies directly under the proposed drop-ship flight path to the Alien headquarters.  
This depot must be destroyed to prevent the surveillance equipment situated there from detecting the Lanios defense forces as they approach the Alien base.
Your drop-off will be to the northeast of the depot.  The depot itself is not well defended but it is surrounded by an extensive trench that prevents direct approach.
The only way over the trench is on the east side of the compound - you must find a way to distract the defending Alien units and get into the compound.  
Once you are inside you must destroy all buildings in the area to insure that you destroy the surveillance equipment.  
Elimination of units is unnecessary for success in this mission but the Lanios Defense Force certainly wouldn't blame you if a few Alien units perished in the attack.
