No, you are right about the belly plates. And it's something about ogres wanting to protect their most valued body part. so, yeah, those also seem not too ninja. Now, I was referring to the little metal (?) pieces plastered all over and I think mottdon got it right.
Here's what I'm currently working on: 45 Empire Spearmen. Some of these models were the very first I ever had and painted up, so I'm really enjoying revisiting this unit and I really want to do a good job on them.