It's more of a lofty goal. First we start off with the local threats involving the Grimm. But Gren's got plans to get back at the White Fang, forcing them to scatter and reminding Gren that he ran from a battle not yet finished. He doesn't trust the Fang to get to job done right anymore what with them attacking Vale and being pawns of forces beyond his knowledge. With any luck he could rally the forces against Salem, but to figure that out he'll need to seek out someone who might know about them: General Ironwood. But once word that the Schnee company has withdrawn shipments, Gren's going to start wondering what they have to do with this. Seems awfully convenient for them to suddenly withdraw their support when Vale needs it the most.
Of course there's only so much a couple of students from Beacon can do. So Gren's going to need to rally what's left of Vale into a semi-cohesive group, and focus their attention on an enemy they can visualize. Salem's too vague an entity for your rank-and-file man to throw his life fighting against. But everyone knows who the Schnees are. They all remember what Atlas had done to them before. Now it's just a matter of finding them and having a bit of a chat.
It won't be easy of course, but I won't be doing it alone. Assuming that we don't get scattered to the four corners of the world I hope that I can get as many of you to join me in my attempts to reunify Vale into a proud nation once again. Our bonds of camaraderie with our teams can become far stronger if we unites as a people.