released a different version of his Seize Zones SP missions in the BI forums
Quote stiff :
Defend the town and the surrounding from the enemy's invasion.
The mission beginning is complete of the preparation for the battlefield in three minutes.
Your base can be defended in the fortress, and a lot of requests be done.
An initial attack target is prepared at the same time.
Sweep away the enemy who occupies the building.
Build the bunker at an advantageous position and prevent the enemy's invasion.