Where was the Regimental Aid Post located and how did it work? And what’s the purpose of the Regiment Aid Post?

The Regimental Post aid was generally located within 200m of the frontline in communication trenches or deserted buildings It worked as wounded men would either walk in themselves or be carried by soldiers - the same process applied to dressing stations The purpose of the RAP is to give immediate First aid and to get as many back to fighting as possible