Health reasons? Did he have some sort of condition that absolutely warranted it?
Or do you mean hygenic reasons?
Yeah sorry. Hygenic reason. When you are in battle (Viet Nam for example) you don't exactly get to clean as often and as well as you want. My Dad was circumcised as a newborn and never thought anything of it. But when he saw adult men having to be circumcised due to infections, he made sure my brothers were.
My Mom has seen enough come through her lab to stress it also. Again, for hygenic reasons.