737th Railway Battalion and Walter S. Fleming

My father served in the army in WW2, as a medic, stationed in the Philippines.  He died in 1970 when I was very young, and we don't know much about his military service.  I requested his records from the government and was told a fire destroyed those records sometime in the early 1970's.

I did find a copy of his "Record of burial place of a veteran", and it lists his dates of service and organization.  The dates of service were 3-15-44 through 4-14-46, and the organization is 737 RR Bn.

I cannot find any record of a 737th Railroad Battalion.  Do you have any idea what 737 RR Bn would mean?
Scott Fleming:  fleming4 [ at] gmail.com