NATO soldiers today are guided by STANAG 2982 on Essential Field Sanitary
Requirements (STANAG is a STANdardization AGreement), which is long enough
to provide latrine paper for a battalion! A typical helpful tip:
Field sanitary appliances must be of simple design, and easily built from materials which are readily available. It is an error to predicate a method upon the salvage of a particular supply item furnishing material.
During the Gulf War of 1991 latrines took the form of steel bins lined with plastic bags, which were removed twice a day and incinerated. Separate latrines were provided for females.
See also army, SAS.