This is all based on the assumption that whatever caused the outbreaks wouldn't hit any major military bases. As massive and well armed as some of the bases are, that doesn't mean they'd automatically bring their full strength to bear if a few soldiers on the base were "rioting". Unless the fort is commanded by whoever is in charge of Madagascar in Pandemic, I don't see all of their power being used. It doesn't matter how strong a man is if you stab him in his sleep.