What actually happened when the WC drove Sauron from Dol Guldur?

[Jon S.]

"... and they put forth their strength; and they asssailed Dol Guldur, and drove Sauron from his hold ..."

I've always wondered what actually happened here. What was the White Council's strength that was put forth, was it primarily (or only) the wizards and lords of the Eldar or were armies of footsoldiers involved, to? Were men or dwarves involved?

And what actually happened at the "assailing?" We know that, from Sauon's perspective, the assault was expected and even encouraged so as to divert the White Council's attention from Mordor where, indeed, Sauron had already dispatched the Nine before the assault to prepare Barad-dur for his arrival. So, who or what remained with Sauron in Dol Guldur at the time that the White Council would have had to assail along with Sauron? Orcs? Trolls? Evil men? No one?