George - is that Record of Events volume part of the supplement?
Yes, there are in essence, two sections within the Supplement. One consists of reports, correspondence, etc. The other is the Record of Events portion containing the Units information from the Compiled Service Records for both Union and Confederate organizations. The Record of Events volumes are organized alphabetically by State.
There is a sizable index of 3 large volumes.
There are some 100 + volumes in all