The V if on the left sleeve, each one means 6 months of service. When worn on the right sleeve each stripe is a wound in action. So if George has one on left then he was in the service at least 6 months but under 12 months if only one. http://www.replicaters.com/ww1USAEFuniforms.htmlhttp://www.replicaters.com/ww1USAEFuniforms.html
Do internet searches of group and pictures. The NARA has an archives of photographs. WWI was the first war where there were a photography unit formed if memory serves.