Which US Army was in the Philippines immediately after World War II?

My father was in the Philippines from end of Sep 1945 through March 1946. I have some photographs of his from that time period. Would love to post them somewhere to see if anyone recognizes the other people, as none of these are labelled. I only saw them after Dad died, as he had the negatives curled up in a canister. The photo below is Mark Caton on the left and an unknown soldier on the right.