ZombieMod takes a unique approach on the Zombie Apocalypse by putting it in the perspective of a military commander, not a survivor. Since it is 2 years after the first infections, resistance on the east coast is organized, resulting in battles rather than small groups fighting for survival.
The Survivor Headquarters is an improvised command center, where units can rally, be reinforced, and can be requisitioned. The headquarters can requisition Survivor Squads and Recon Teams, which are the main fighting forces of the Survivor faction. The building can be garrisoned if the base comes under attack.