[Gil-Galad]

There is nothing saying that the orcs of Mt.Gunbadad did really much after the dragon incidence, soem orcs from moria helped saruman, to revenge there fallen brethern i nthe mines by the fellowship... and after angmar fell, most of hte orcs were hunted out, or feld to orc infested places, War of the dwarves and Orcs, where most of both race were greatly dimished, so i doubt angmar did really much, except help in saurons plan for kiling the north kingdom