Board Thread:Episode Discussion/@comment-14138255-20160131163802/@comment-14909251-20160202182204

I doubt the Grimm slaughtered the defenses of the city. Seems most of the Grimm moving in on Vale were brought there or can fly. Given that Cinder was hacked into the CCT and other areas, it is quite possible that they just disrupted the city's defensive communications and other defenses to allow some Grimm to slip through to the city in addition to those they smuggled in on their own. Activity on Beacon is probably not the most telling either since they seem to have Grimm nearby that aren't blocked by any artificial defenses. On top of the White Fang and Torchwick sowing chaos inside the city, it is not surprising they would not be able to hold back all of the Grimm.