I found his serivce number online. It's 37734955

His code number was 5? 5Philippine Scouts (Officers and Enlisted Men)

NO#No branch assignment

This was taken from NARA - AAD - Display Full Records - Electronic Army Serial Number Merged File, ca. 1938 - 1946 (Enlistment Records)

But I can't find any details on where he was assigned or to what group. Any ideas?