Carl Heller was a German citizen who resided in The Netherlands before the First World War broke out. In 1914, he was conscripted into the German army. Deployed on the Western Front, he fought in Marne, Argonne, Verdun and Ypres. He was severely wounded on three occasions, and received the Iron Cross. During the war, Carl Heller wrote down many of his experiences and impressions. From these documents, it transpires that Heller was, at some point, wounded and nursed in the BIE-region.