Yes, I meant the 2 different tactics. The reason I was asking is because in Kenneth Pollack's 'Arabs At War', he mentions the Iraqis making use of such tactics as they were thought these by the British. It got me wondering as to how many other armies use similar tactics, especially the reverse slope position which I think would be a logical tactic for any army to employ. In Wiki it was mentioned that Argentine units occupied forward slope positions but whether this was part of their doctrine or whether it was just a poor tactical choice is unknown.
It's been a while since I stuck my nose into tactics but in Aust the blackhats definately used to move from bound to bound by reversing back from their hull down overwatch position and popping around or at least cresting the bound at a different point.
When it comes to the question of whether a reverse slope defence is worth employing it would depend on the ground, the enemy orbat and a host of other factors. Some positions lend themselves to such a defence others not so much. Other times it would be stupid to employ the tactic.
For instance if you had an enemy that had a limited number and type of direct fire weapons, whilst yiou had weapons that had a serious ability to reach out and touch someone and you had a large clear killing area in front of a position, you may site forward confident in your ability to seriously degrade any assault before they got close enough to use their weapons.
Then again, if the enemy had the range advantage and or armour and you had light weaponry, then a reverse defence may make the most sense - you can take out the enemy armour with short range weapons as they crest a ridge (belly plate shot). Another thought would in the past have been that being on the reverse side of a hill makes even indirect fire difficult to direct - then again today with UAV's becoming so prevalent, the reverse slope defence may not offer freedom from view.
Just a few thoughts from someone who hasn't sighted a wooden stake in 19 years.