York county is the next county east of Adams county, the county seat of which is Gettysburg. It's near enough it had a fair amount of Civil War action. The York blogs have mentioned some of this. This post at Universal York has a list of names from Lower Chanceford township which were in a hastily-alerted unit mustered during July 1863. I see several Stewarts, who might descend from Capt. John and Mary Orson. I also note some surnames which are familiar in NY: Grove, Fulton, Boyd, Smith--I often wonder whether the migration to Geneva, NY accounts for some of the overlap in names between the two areas.
With this number of men from Lower Chanceford, I also wonder how many were away fighting?