At that point the 'city map' is loaded and you deploy your different mercenary teams right before the zombies arrive. They try to fight off the walking dead as the chopper lands at your designated locations to lift people to safety. Try not to get overrun! Zombies infect people who of course turn into more zombies. When night falls, zombies pour into the city from every direction, so be fast!
If you rescue a certain number of people before they're all killed then you 'win' that territory and collect points. The zombies also get points from infections and number of territories controlled. As points accumulate for both sides different events and abilities are unlocked, which ramps up the challenge and fun. Either side can reach the limit for the campaign to win ultimate victory.
