(Spoilers Main) How many men did Daemon gather at Harrenhal in the books?

And what did Daemon do with them? Because it seems to me this host was not the ones that faced the Greens at the Redfork and at the Lakeshore. It also seems to me that Daemon did not bring them to the Fall of King's Landing because surely Aemond's force would have encountered them on the way there.