I had always heard that it was the grey uniforms that changed to butternut as they were exposed to the elements...
I always thought that butternut was used after the south ran out of dye. They boiled wallnuts and used the water as dye and thats were butternut came from.. But i dont know.. Could be..
The Confederacy never could supply grey uniforms for everyone. The Confederate reenactor could wear most anything, because that is what they wore.
I have a familiarity with black walnuts. One of which has to to do with putting them into frozen ruts and spinning tires on them.
Butternuts were a different kind of walnut.
Since I used to live in Montgomery county, Illinois, I would welcome seeing anything you can supply online...In one of the history books dedicated to Montgomery County, Illinois, it mentions that those with southern sympathies wore "butternut badges" to identify each other in 1864 during the time of the "Clingman Raids." Seems that, at least at that time, butternut was common.
Since I used to live in Montgomery county, Illinois, I would welcome seeing anything you can supply online...