Diary of Private Alexander G. Downing: Saturday, March 12, 1864

All the men of the Iowa Brigade who did not re-enlist have been formed into a battalion until the veterans return. Major Pomutz of the Fifteenth Iowa is in command. All the non-veterans of the old regiments are to remain at Cairo, Illinois, until the veterans return from their furloughs.

Source: Alexander G. Downing, Edited by Olynthus B., Clark, Downing’s Civil War Diary, p. 174