A couple of readers pointed out that Atheringdon would almost certainly have been through Fort Benning at some point in the past. The point was that as an officer his experience would have been significantly different than from the enlisted trainees.
A few readers pointed out that Armor is actually at Fort Knox. Sorry folks, but Armor was at Fort Knox. In 2010, as part of the BRAC (Base Realignment and Closure) program, The Armor School was moved to Benning.