Attached is a hand drawn map of the route of 143 Field Ambulance in May 1940. It was drawn by Major Erric Richard Stanford. I believe that my grandfather was a driver for the Major and the 143rd Field Ambulance. Would this mean my grandfather was in the RASC or the RAMC? I believe my grandfather was in the RASC, but I have no idea what regiment etc.... how would i find this out? I'm trying to retrace his steps back in the UK once he was evacuated at Dunkirk with 143rd on 1st June 1940. Any ideas guys? Thank you.