WW1 American Expeditionary Forces, Advance Sector, Service of Supply

AEF supplies destined for the Doughboys at the front were funneled through a series of depots and installations located at key points along the 'Lines of Communication' (LOC). The LOC was divided into the 'Base Sector', the 'Intermediate Sector' and the 'Advance Sector'.
The soldiers stationed at the Advance Sectors would have worn the Advance Sector, Service of Supply SSI.
Worn primarily by members of the Quartermaster Corps.