Quote Originally Posted by Rifleman View Post
That's different than what I usually hear. Many on this board (and other boards I've lurked on) seem to advocate a return to big brigades of three or four battalions.

The idea of a smaller division with a smaller staff is interesting. Am I correct that commanders of most Roman legions actually commanded about 10,000 men in the field because the famed legions of 5000 - 6000 men were supported by an almost equal number of auxiliaries? And, of course, the Mongol tumen was 10,000.

I don't know if those examples are applicable to modern warfare but I find it interesting that their strength is what we would think of as a small division.
The span of command at that time depended on marching speed, courier rider speed and visual battlefield range. 25,000-30,000 was the practical corps/army size until the 19th century.
This doesn't tell us much about today. It's merely interesting up to the early 20th century divisions, which were almost that large.