WW1 US AEF Engineer Regiment Shoulder Patch

The WW1 US AEF Engineer Regiment Shoulder Patch is an original uniform insignia used by members of the United States Army’s Engineer Regiments during their service with the American Expeditionary Forces (AEF) in the First World War. Typically constructed from olive drab wool with a distinctive red or scarlet castle emblem, the patch was designed to be worn on the upper sleeve of the service coat. The red castle motif has been a symbol associated with U.S. Army engineers since the 19th century and was used to distinguish engineer units from other branches. These patches were created both in the United States and in theaters of operation abroad, leading to minor variations in materials and stitching. The shoulder patch served both as a mark of unit identity and as a means of quick recognition for military personnel. Today, original WW1 engineer regiment patches are valued for their historical significance and as examples of early 20th-century military insignia.