Board Thread:General Discussion/@comment-9464517-20160219131345/@comment-10390252-20160219131715

As far as I can tell, it was all meant to happen at the same time. The Breach was one of the ways Cinder wanted to import White Fang troops (including heavy weapons mechs) and Grimm into Vale. The more breaches in Vale's security, the more destruction she causes and the more freedom of movement she gets with more and more of the city's defenders tied down or even killed in the early surprise period of the offensive.