Prior to the 1971-72 major reorganization of its MTOE, Groups used to have 4 BNs (called ODCs or Companies then) - A, B, C, and D (with 3 or 4 ODBs per ODC)...and some even had an E Company. Just noodling - but maybe this idea also entailed some of the thinking that not only was it easier, but that it was less threatening and a bit more palatable to DA to accept a
return to that concept for historical reasons rather than seeking to add more Groups.
I remember when we were barely at 3 AD Groups (5, 7, 10) w/3 BNs each and 5 ODAs per ODB and
almost went to 2 Groups (5, 10).
The more things change, the more they seem to remain the same.
And so it goes...
Richard's
jaded $.02