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 second base on this map is a construction site with lots of open space. When playing with fixed starting locations, this is the survivor base. Work in progress.
Must be like going home for the survivor builders.