Originally Posted by Maylander
If I recall correctly, they'll only turn on you if you talk to an orc leader after liberating the towns. As long as you stay clear of the orc leaders, the rest won't turn hostile.

I could be wrong, but I thought I remember all Orcs turning hostile if you liberated 3 towns.

Anyways, I ran into an annoying bug where certain Orc leaders were going aggro on me even though I hadn't liberated 3 towns.