Statistics for occurrence #1 of “Brigadier-General A. S. Williams” in chapter 7, page 214 of The Photographic History of The Civil War: in ten volumes, Thousands of Scenes Photographed 1861-65, with Text by many Special Authorities, Volume 10: The Armies and the Leaders.:
...wly formed Twentieth, for the Atlanta campaign.
After Mansfield's death, the command of the Twelfth Corps was held by Major-General H. W. Slocum except for very brief periods, when it was headed by Brigadier-General A. S. Williams , the senior division commander.
In its short career, the corps is said to have never lost a gun or a color.
...