I found this photo in some of my father's belongings after he passed away. The photo includes the names of each individual and the names correspond with the numbers written on the photo itself. Below is a transcription of what is typed on the photo. Other than my father, Pvt. C.G. HOLTZ, I do not know any of the other men in the photo.
Adjutant General's School
Company "E", Enlisted Battalion
2nd Platoon, Enlisted Postal Course, Class #5
Fort Oglethorpe, GA
May 1946