[jp10]

Here is a modified reverse slope defense that we used once at the National Training Center in the Mojave desert. (Ft. Irwin CA.)
Our tank heavy battle group was deployed along a linear elevation in a deliberate defense against an OPFOR brigade sized attack.
Scattered ahead of the defense, 500m-1000m, were dismounted LAW/Dragon/TOW teams dug in on the reverse slope of terrain features orientated towards the defenders. (away from the enemy advance)
A group of the defenders (tanks and empty APCs) engaged the enemy at maximum range then displaced to prepared positions to make sure the enemy fixed upon the distant ridge as the defensive line.
As the enemy advanced past the forward positions the AT assets engaged them against their rear armor while the defending tanks engaged them from the front.
The defense was successful although the mop-up was a messy affair as the OPFOR attack devolved into widely scattered groups of vehicle deprived attackers and the defenders need to counter attack to support their now isolated reverse slope AT/Infantry teams.
If interested, I was part of a 4 man recon team deployed to a rocky and hopefully inaccessible hill top about 5 KM ahead of the battle to call in air/artillery (and direction of attack) on the OPFOR.
It was definitely a set-piece battle and a desperate defense tactic but in regards to time constraints/on hand troops&equipment and left/right terrain and boundary constraints, the old adage of set-piece battles only occurring in textbooks is not true IMO.