We had some visitors in camp today from Inland. Nothing of importance. The part of our uniform most talked about and criticised is the leather collar, which each man has to wear. It is a piece of stiff upper leather about two inches wide in the middle, tapering to one inch at the ends, which are fastened with a buckle. We wear it about our necks with the wide part under the chin to make us hold our heads erect. These collars the boys call "dog-collars."
Source: Alexander G. Downing, Edited by Olynthus B., Clark, Downing’s Civil War Diary, p. 16. See footnote on Tuesday, November 5, 1862 diary entry for additional information about the "dog-collars."