[Kuruharan]

Guerilla fighters are not entirely self-sufficient. They often resort to using a sympathetic populace to feed them when they are on the move.

You are not taking the circumstances of the situation into account.

There was no "sympathetic" population for the orcs to impress and gain supplies from. There were targets to be scared and killed. Orcs were good at scaring and killing.

Raiding is very much a piece of guerilla warfare, but it is not the entire puzzle. This sort of activity can be engaged in by traditional armies, and actually is quite often.

Which is what I was talking about. Besides, are not orcs frequently spoken of ambushing people?

The Nazgul, too, I do not see being very good at guerilla warfare. It is rather difficult for them, it would seem, to engage in it effectively with their...unique...physical properties.

Would you care to explain why?

I think they would be uniquely suited to it because creating terror was what they did best.

Unless I am mistaken, I thought there was an entry in regards to the orcs and Easterlings, and their hatred of one another.

I can't remember reading anything like that. While I doubt that the orcs and Easterlings liked each other very much, they would definitely been on the same side.

Cite sources of where the Witch-King, as a military commander, chooses subtler methods over his favored option of traditional combat.

He tricked Earnur.

Treachery does not have to come in accord with the Enemy's plans. Such things can happen rather randomly, as an act of good fortune for the besiegers...by, in WW terms, a Cobbler type person. Thus, is not a clear indication of any subtle tactics being exercised.

True, but the other side of that coin is at least as likely. I don't think there is any fodder for either side to gain from this issue.

Thus, he could very well have had an advantage in numbers.

And where did these troops come from and how were they supported? Up to this point you've failed to give an adequate explanation for this.