The main objective of the Maverick forces is to 'blood' their Regulars, and pick up a few new soldiers. The idea is to use Aerial superiority and surface-to-air artillery strikes to stall or destroy the Repliforce dropships, overwhelm El Sobrante and slaughter a significant percentage of the population, and then pull back with their survivors.
Retrieval is to be handled thusly: a stealthed transport will drop in and pick up the soldiers near El Sobrante. Said Transport will bring 50 veteran Maverick Regulars to cover the evacuation.