Here are a few images I've gathered that are unusual in the sense that they portray banjo players "in the field" rather than a typical studio setting. Check out that wild neck profile on the banjo pictured above ^ for starters!

United States Army camp, 1861-65, unknown location.

United States Army camp, probably in northern Virginia 1864-65.

Confederate troops at Pensacola, Florida 1861-62.
Tony Thomas
2018-04-05 03:30:39 +0000 UTCClifton Hicks
2018-04-03 15:53:53 +0000 UTCRobert T. Gibney
2018-04-03 15:27:49 +0000 UTCTony Thomas
2018-04-03 13:27:59 +0000 UTC