In the Army, out in the field, latrines were dug by enlisted men.

I remember one for the enlisted people was was, as these go, nearly palatial. There was a seating arrangement made of poles, so that the user could more-or-less sit whilst doing. The one for the officers was also quite nice, only those who constructed rounded the place where the user's feet would be placed, and THAT caused a slippery, sliding sort of problem and if you weren't VERY careful indeed...well, officers had to be very careful when using.