IABL, for the med. theatre I found this italian map (made in 1918) of the mined camps and gun batteries during WW1. the mined camps in Italy were made during 1916/1917.
PS:
orange squares: camps made by german and K.u.K. force.
red squares: camps made by italian forces.
green squares: coast defended by armed trains.
black "points": gun batteries
I hope that it could be helpful and sorry if the image is too big
