Identified photograph of WW1 Soldier (SOLD)

This is something I am not too familiar with, but was part of a collection I recently acquired. It is an identified photograph of a WW1 soldier. He is in uniform with a serious look on his face and in front of a tent. The framed photograph has an overall measurement of 8 ½” x 7”.

Written on the cardboard on the back of the frame is “To Stella Wagner / From William Duncan”. This photograph is clear and the picture and period frame are in excellent condition. Would make a nice research project.