Donated by the Iowa Sons of Union Veterans at the June encampment in 1936.
Nelson was the Commander and Chief of the G.A.R. from 1935 to 1936, and served as a Representative during the 1st and 22nd General Assemblies. He also served as a Sergeant-at-Arms in the House of Representatives from 1923 to 1937. A photograph of Oley Nelson hangs in the House Chamber.