The “WW1 Canadian CEF 4th Ammunition Sub Park Collar Insignia Single” is a distinguished military artifact from the First World War, representing the Canadian Expeditionary Force’s 4th Ammunition Sub Park unit. This collar insignia served as a crucial piece of identification for members of this specialized unit, responsible for the vital task of managing and distributing ammunition to the front lines. The insignia features notable military insignia design elements from the era, crafted with attention to detail and durability to withstand the rigors of wartime conditions. It is a significant piece for collectors and historians, as it offers a tangible connection to the involvement and contributions of Canadian forces in World War I. The insignia not only symbolizes the bravery and dedication of the soldiers but also highlights the logistical and support roles that were essential for the success of combat operations.