I'm trying to develop an "historical" army organization, along the lines of http://www.nps.gov/archive/gett/getttour/armorg.htm, where the key feature is:
- Armies (commanded by a 3- or 4-* General) contain Corps
- Corps (commanded by a 3-*) contain Divisions
- Divisions (commanded by a 2-*) contain Brigades (and other attached units)
- Brigades (commanded by a 1-*) contain "elements" (Regiments, Batteries, Cavalry Squadrons etc.)
According to http://www.ageod.net/aacwwiki/Manual:Army_organization#Command_Chain, this seems allowed -- even necessary.
However, when I place a general in charge of a Brigade, that Brigade can not be included in a Division.

The confusing part is that Army/Corps/Division generals can each exist, but a general commanding a Brigade has to be independent of a Division.

Intentional, or a design oversight?