An old thread for sure so apologies is I am grave digging but this is definitely a wartime photo, the background is probably Camp Chase in Columbus, or Camp Putnam the boys set up over Marietta OH, and given that there are other pictures of the battery with that Camp in the background I highly suspect the latter. This would be in 1861 during the WV campaign. According to the WRHS the woman with the Sabre is Kate Howe who was the wife of Lt George Howe who is the man standing on the opposite side of the wheel. The women were very supportive during this time period, they made life in camp easier for the men and made red flannel powder bags for the cannon allowing the battery to do live fire practice.