This photo depicts several men who were enrolled in the Enlisted Men's Technical School. This school was an eight week course that was meant to teach active enlisted soldiers to learn technical skills.
"GARDNER, WILLIAM W. (b. 1872). DAYBOOK, 1918. 0.1 cu. ft. Merchant in Lafayette (Montgomery County), Virginia. Daybook providing customer names, goods purchased, and prices paid. Available on the Virginia Heritage database. Ms1940-011."