Under the might of the IFVs, the standard zombies could not even have the strength to resist. The reason the military could clear Longhai survivor camp of zombies was, in no small part, due to the might of these vehicles.
The vehicles behind closely followed after the bloody path that the IFVs had open up, and escaped out of the survivor camp.
Once the vast number of cars left, they left the south gate wide opened, and massive swarms of zombies entered into the city.