It's quite possible that I've just managed to miss this, even though I read so slowly, but there seemed to be a big build-up when the "Wild Men" were talking to Théoden king and it seemed like they were going to become an important force to aid the Horsemen of Rohan as they in turn aided Gondor for the greater good.
But after revealing the secret/forgotten paths (which, admittedly, was also quite valuable), there seems to be not a word about the Wild Men? Perhaps further ahead than where I currently am, with Aragorn healing Faramir, but at least they haven't been mentioned yet and I also have no memory of this happening at any point.
Is it just implied that the Wild Men did their part? I wished to at least get some brief mention of a bunch of a dead orcs with spears in their throats or something, clearly accomplished by the Wild Men before they disappeared into the woods or something. But... nothing. I hope I've just missed that part.