Also, there were mentions of other orcs used as slaves. There was mention of the bath-filling orc in Lord of the Clans and pooped-on orc in Cycle of Hatred. Some days I wish I could remember names a little better.
I'll try and pick it up from the local library whenever they have it again.So? The orcs were tricked into battle, but how they went about waging war was their own business. Even the mildest Orc relished battle and literal taste of blood. You should read Rise of the Horde. The Orcs were savage even without warlock magic and the Blood Curse as excuses.