[Rumil]

I think Galadriel has a useful part to play in this discussion.

She maintained that although the White Council had driven Sauron from Dol Guldur, by the time of the War of the Ring, Dol Guldur had been reoccupied by the forces of Sauron with seven-fold their previous strength. I'd imagine it must have been full to bursting with the extra snagas and uruks!

These forces were unleashed in a number of directions during the war. They definitely attacked Lothlorien three times and were soundly defeated, they attacked Rohan while the main force of Rohirrim were in Gondor, but were caught by the ents on the Wold and massacred (this was probably part of the force that was repelled from Lothlorien). Forces attacked the Woodmen, Thranduil and possibly the Beornings in Mirkwood and maybe forces were sent to attack Erebor. Some of the attacks on Lothlorien and Mirkwood were no doubt supplemented by the goblins of the Misty Mountains, but you get the idea.