I am trying to gather more information about my father-in-law's WWII service. His discharge papers indicate his military occupation was "Military Policeman 677" and the organization he was with was "M P PLAT 4TH CORPS". He served in the following campaigns...Rome-Arno, North Apennines, and PO Valley. His name was John H. Sonju and he was from Portland, OR. Is there anyone who can tell me what unit he was in from this information? I am hoping to find other members or a website related to his MP unit. Any help is appreciated.