During every month, a number of territories get infected and I get to pick which one to rescue.
At times however it seems there's very little to base this choice on. For example, right now I can choose between seven territories, all with a population of 125, all with a difficulty of 1, all rewarding mercenaries.
Is contiguity something I want to worry about? For example, right now two newly infected territories are contiguous with areas I own. I'm worried that might be bad news for those areas.