Des?

Moss which had been obscuring some World War 2 graffiti has either weathered or been removed by wildlife, revealing the complete graffiti. It now appears to d read either 'DES 1944' or 'DRS 1944'. Also revealed is another, more elaborate, piece of graffiti; unfortunately the nature of the localized growth on the tree, it is all but obscured.  I know there is more, or was more, graffiti amongst these mature Oaks and Beech; I remember seeing it, maybe 20 years ago and remarking that it represented both American and British wartime graffiti ( I can't remember how I could identify the nationality, but I could).  As yet, I can't find it.