I'm thinkin' this is post Korea but maybe about '58? Or so...? Note the buttonless shirt cuffs of the corporal leaning left.
I was close anyway...caption is "Korea 1955—Red Cross Clubmobile staff serving coffee to men of the 32nd Infantry Regiment, 7th Division, during field maneuvers. Photo by Dorothy Moore"
The vehicle is a designated coffee wagon of the red cross girls. Thus the odd decorations.