How the wounded were dealt with
1. Stretcher Bearers recovered dead and wounded, often under heavy fire, carrying only basic supplies like morphine, with only 16 bearers per battalion (1,000 soldiers)
2. Regimental Aid Post (RAP) was located within 200m of the front line, sometimes in communication trenches or ruined buildings, with only one regimental medical officer who decided who needed to be sent to the dressing station, providing only basic first aid that was not sterile
3. Dressing Station/Field Ambulance was a mobile unit of medical staff 400-1000m behind the line, staffed by ten medical officers plus orderlies and stretcher bearers, with facilities to cope with 150 men but could not tend to the wounded for more than a week.