Steiner Photos #2120; Unidentified men; Anstalt, Ulm.
They are probably soldiers from the 1st World War.
They may have been comrades of your Great Uncle Karl Fassnacht.
He was discharged from the front in Flanders at the end of 1918 in Ulm,
but he is not in the photo.
He was a soldier in the Wurttemberg Infantry Regiment 413,
which was deployed in Flanders.
Photo has been downsized, contact me for slightly better copy.