I found this photo at an antique store in the Sellwood area of Portland, Oregon on March 14, 2014. The following names were written on the back, from top to bottom: George Camp, Charlie Lovell, Hutson, S.C. Carter, C.S. Plowden, R.J. Roberts, Delaine. It appears from similar photos that I have this is dated around World War II, or maybe late 1930's. I am not sure which branch of the military this is.