I agree with VB but prefer square organizations to triangular unless I have more than one. Most battle are Meeting Engagements in SP. In RL MEs are generaly fought but the lead Battalions AKA the Advanced Guard. Advanced Guard BNs are most often based on a Mechanized Infantry BN reinforced with tanks,ADA,ARTY,Engineers,Anti-tank, and most importantly RECON units.
For example: the Russians would take a
Motorized Infantry BN (3 companies plus at least an AT,Mortar,and SAM platoon)
Tank Company(with 3 mine plows)
ADA platoon
ATGM platoon
Engineer platoon
SP ADA platoon
On board 122mm Artillery Battery or Battalion
2-3 BNs of off board ARTY 122 and 152mm
Recon Company from Regiment
That is just one example. of course it all depends on your points, the terrain and what you've negotiated with your oppo.
You should read Greybeard's article on "Ad-hoc Company Teams" I completely agree with him in principle.
And VB,
You know exactly which Brazilians I'm talking about
The one's who are getting a free ride at the World Cup:whis: