Barbed Wire - How best to use it??

[Ratzki]

Wire can make good flank protection, giving you time to wheel fast units to the potential breakthrough and not requiring a force of some sort to be stationary, guarding what may never be attacked.
I put my wire in the open, I want the opponent to see it well in advance and start to move in the direction that I want him to. I want him to pay for crossing the wire and pay dearly for moving around it. I think it should be in a MG's medium to long range, and in open ground so enemy infantry cannot engage my units with any sort of effectiveness from his side of the wire.