Board Thread:TV Show Discussion/@comment-4708902-20160909023801/@comment-28895263-20170407054733

Yes, I think that they will fight in the North.

Daenerys is looking for an alliance in Westeros. Jon Snow will agree to support her claim to the throne in the South, in exchange for an army for the War Against the Dead, in the North. The "clothing" problem is easily solved; weapons will be another story.

(I'd like to think that Samwell will discover the location of a large supply of dragonglass from his readings at the Citadel.  He'll show up at Winterfell, or Castle Black, at the head of a wagon train of weapons.)

Zanbar: In GoT season 1, we saw Jon Snow kill (if that's the right word) a wight walker with fire from an oil lamp. I doubt that it would stop one of the Others. So far, that takes Valerian steel, or dragonglass.