Comprising pits dug to a depth of 4-6 feet and usually approached by a short trench either to the rear of the line (or, in the case of the front trench, curiously in advance: presumably to discourage any inclination to linger), latrines provided an all-pervading smell which came to be firmly associated with trench warfare in the minds of veterans. Latrines were not meant to be permanent. Battalions leaving the line were tasked with filling in their own latrines and preparing fresh pits for the incoming relieving force. On many occasions however buckets and even biscuit tins would be used in place of deep pits; these would be emptied on a daily basis. Similarly shell holes were placed to effective use as toilets. Each company would typically assign two men to sanitary duties, a much-despised task. It would be their responsibility to maintain latrines in good order. Inevitably given the widespread distaste for the job men would often be punished for breaches of the army code by being assigned sanitary duty.