In the Vietnam war, the US's war dogs prevented over 10,000 casualties. Yet, when the US pulled out of the war, the majority of those brave dogs were euthanized or abandoned due to fear of contaminates coming back to the States, and were labeled by officials as "army surplus."

I learned in depth about this after watching a special documentary on war dogs a few years ago. Might not be the breed specific fact you were looking for, but wolfsoul's last post made me think of it. American soldiers wept as they were interviewed, recalling their wonderful dog companions in the war.